A regulatory shock and a domestic lottery cluster defined the upside. The Netherlands moved on the KSA (gambling regulator) 2025 annual report, causing publications in the media and raising the demand. Colombia stacked a Constitutional Court refund ruling with big lottery winnings. South Korea also recovered on a Lotto draw after the prior week’s enforcement-driven dip. US states Illinois and Texas moved together on NBA first-round playoff games.
Downside split between active enforcement, pure hangovers, and small-base drift. Thailand’s drop extends a suppression layer. Czech Republic and Spain shed prior-week sporting peaks with no replacement. Nepal continues a fourth consecutive declining week as the URL-blocking regime carries on. Somalia gave back the prior week’s drift on a small base.
Top gainers
Colombia +49.3% — Colombia’s Constitutional Court ordered DIAN (Colombia’s tax authority) to reimburse taxes collected under the annulled emergency decree. The total liability is estimated at $6M and operators are returning to standard 15% GGR taxation. On April 25, three regional jackpots ran simultaneously with over $10M combined in top prize. National lottery, Baloto, meanwhile, drew with no winner, and the combined pool reached $13.5M, the year’s highest.
Netherlands +25.0% — The KSA’s 2025 annual report, released on April 21, found the legal market shrank 18.5% over the past year while reports of illegal offerings rose 34% to 2,005 cases. Channelisation by revenue fell from 51% to 49%, the first time the unlicensed market has out-earned licensed operators since legalisation in 2021. The $12M KSA budget shortfall and signalled enforcement expansion to payment providers and B2B suppliers generated broad national coverage.
US-Illinois +15.3% — NBA first-round Games 2 through 4 ran through the reporting window, providing a continuous playoff betting surface. Illinois is a top-tier regulated sports betting market and the postseason lifted search activity statewide despite the Chicago Bulls’ absence from the bracket. Eight series produced multiple high-profile matchups across the Saturday and Sunday slates.
South Korea +15.3% — Lotto draw 1221 on April 25 produced 16 first-prize winners, each receiving $1.3M, with national outlets running the result through the weekend. The recovery follows the prior week’s –16.6% dip on enforcement coverage of the Korea Sports Leisure illegal-betting reward scheme — a compressed baseline that amplified the percentage rebound.
US-Texas +14.6% — The Houston Rockets faced the Los Angeles Lakers in the Western Conference NBA playoffs while the San Antonio Spurs played against Portland Trail Blazers. Texas has no licensed online sports betting, so the NBA postseason lift surfaces through search demand for offshore sportsbooks.
Top decliners
Thailand –21.0% — Suppression, two enforcement waves landed inside the reporting window. Police raided two Bangkok gambling dens on the night of April 25, arresting 104 punters across Khlong Sam Wa and Bueng Kum districts. A separate April 20 Pattaya raid netted 68 Indian nationals running an online gambling hub. Both actions extend the suppression layer from the AMLO (Thailand’s Anti-Money Laundering Office) freeze of $634M in assets following the April 9 arrest of Pei Min Si. A second consecutive declining week with no easing signal.
Somalia –20.8% — Drift. Somalia gained +16.9% in the previous week with no identifiable trigger, classified as technical drift on a small base. The –20.8% reads as mechanical reversion. Gambling is fully prohibited domestically and demand runs through offshore channels only, so weekly swings carry no structural signal. No country-specific trigger surfaced for the window.
Czech Republic –18.2% — Event hangover. Czech Republic posted +17.8% in the previous week on UEFA Champions League (UCL) quarter-final activity that concluded April 14–15. No country-specific sporting, regulatory, or enforcement trigger surfaced inside the April 20–26 window, with UCL semi-final first legs not falling until April 28–29. Pure mean reversion off the prior peak.
Nepal –17.7% — Suppression. The Nepal Telecommunications Authority’s (NTA) blocking regime scaled past 10,000 sites and apps as of April 15, with Nepal Telecom alone exceeding 21,000 blocked URLs. The expansion follows PM Balendra Shah’s 100-point reform plan and the March 27 Cabinet directive ordering 24-hour shutdown of betting infrastructure. Fourth consecutive declining week since the initial –55.4% in Week 14, with no easing signal across the reporting window.
Spain –16.5% — Event hangover. The Copa del Rey final on April 18 — Atlético Madrid vs Real Sociedad, 2–2 after extra time, decided 4–3 on penalties — drove Week 16’s +11.8%. No replacement fixture sustained demand inside the window, with UCL semi-final first legs not until April 28. No in-window DGOJ (Spain’s gambling regulator) enforcement surfaced; classification is pure event hangover.
Market spotlight: Colombia | +49.3%
Colombia’s +49.3% ran on two independent catalysts arriving in or just before the reporting week. The Constitutional Court’s unanimous ruling ordering DIAN to refund taxes collected under the annulled emergency decree generated press into the April 17–22 window. Total liability estimated at $6M, with $400M in tax-benefit-scheme payments deemed legally consolidated and not refundable. Operators now run under standard 15% GGR taxation while the political fight over a replacement gambling tax shifts to Congress.
The lottery cluster was the second catalyst. On April 25, three regional jackpots ran simultaneously with over $10M combined in premio mayor across Lotería de Boyacá, Lotería del Cauca, and Sorteo Extraordinario. Baloto sorteo 2648 produced no winner, with the combined Baloto and Baloto Revancha pool reaching $13.5M — the year’s highest. The Wednesday April 22 Baloto draw had also rolled over, sustaining demand across both midweek and weekend cycles.
The forward profile splits cleanly. The Court ruling removes a structural overhang at least through the May 31 presidential election. The lottery concentration was a one-time event with no immediate sequel. Copa Libertadores Matchday 3 runs April 28–30, but Colombian clubs sit at zero wins through two matchdays, limiting continental upside into next week.
Regional snapshot
Americas
Colombia dominated at +49.3% on the VAT refund ruling and the April 25 lottery cluster. US-Illinois (+15.3%) and US-Texas (+14.6%) moved in parallel on NBA playoff first-round Games 2–4 — Texas had two local franchise series running, Illinois the broader postseason cycle.
Europe
Netherlands led at +25.0% on the KSA’s April 21 annual report, generating national press. Spain reversed –16.5% as the April 18 Copa del Rey afterglow cleared, with no in-window replacement catalyst. Czech Republic shed –18.2% on a symmetric hangover from Week 16’s UCL quarter-final lift; no in-window country-specific trigger surfaced.
Asia-Pacific
The region split between structural suppression and a domestic lottery bounce. Thailand declined –21.0% as enforcement extended into the window with the April 20 Pattaya raid and the April 25 Bangkok gambling-den busts. Nepal held at –17.7% in a fourth consecutive suppression week as the NTA blocking regime carried past 10,000 URLs. South Korea posted +15.3% on Lotto draw 1221 — 16 first-prize winners at $1.3M each.
Next week watchlist
Europe — Champions League semi-final first legs
PSG vs Bayern Munich (April 28) and Atlético Madrid vs Arsenal (April 29) put clubs from France, Germany, Spain, and England in elimination football simultaneously. Spain enters on a compressed base after this week’s –16.5%, with Atlético hosting Arsenal at the Metropolitano.
Latin America — Copa Libertadores Matchday 3
All eight groups play simultaneously, anchoring the regional betting calendar. Colombian clubs sit at zero wins through two matchdays, so Matchday 3 results determine whether this week’s +49.3% holds as the lottery and ruling tailwinds fade.
Thailand — enforcement continuation
Two consecutive in-window enforcement weeks with no pause signal. Any AMLO follow-up on additional asset seizures could extend the suppression layer into May.
Methodology note
Blask Index tracks real-time iGaming player interest via AI-analyzed Google search data, updated hourly and filtered to remove low-intent noise (scams, complaints). WoW% measures momentum: positive indicates growing attention; negative indicates declining attention.