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Offshore share in Michigan was already falling before October’s cease-and-desist letters
One side of the market had been shrinking for a year before the regulator acted.
On October 8, 2026, the Michigan Gaming Control Board issued cease-and-desist letters to 33 offshore operators offering online casino games, sweepstakes-style games or sports betting in the state without a license. The September figures give the size of that book in search and in projected revenue.
Blask data for September 2026 puts 77.4% of Michigan iGaming search and 78.9% of CEB (projected revenue) with onshore brands. The unlicensed side held the other 22.6% and 21.1%, 1.5 percentage points apart. A year earlier, it stood at 30.3% and 26.8%, a wider gap.
Licensed CEB rose across that year, offshore CEB fell 23%, and the two together slipped 1.7%. Blask Index for Michigan was down 25% — a steeper drop than in projected revenue.
FanDuel’s 21.9% of September BAP nearly matches the unlicensed book, with DraftKings at 19.9% and BetMGM at 13.8%, all onshore. Inside the top-4, Bovada is the largest offshore name, at 11.5%.
