Good question.
I think the legality has to be settled first, then they can make a move. Probably years away.
But even if it's legal... in some states what do you get? Some vanilla website with 10 games a week? I have yet to see a legal state where you have a website and bet on games on your phone. So fuck, might as well not even be legal. What was the point?
Illegals have more rights than a regular parlay or teaser. Injustice!