Only the mutual doesn't cut you, because the mutual at 1000 euros will share the 900 no matter what and it has no problem.
The old illegal bookies of the Hellenic racecourse also cut every now and then.
In fact, they were cut off and re-admitted afterwards, it was history with them.
I had fallen into the following phase:
A gambler wins a million and a half from a bookie. He goes to get the money, the other takes it out and gives him a package consisting of ten thousand, five thousand, thousand, one dollar (!) but also bills of exchange!
My fat player owed me thirty thousand and he takes out and gives me a bill of exchange of the book, which was from an electrical goods store in Ano Patisia and expired after three months! I collected it in the end, of course.
The bookie, a friend otherwise, was crying as you can tell and we told him "it's okay, you'll set some bones and report".
Internet companies won't take that bookie's place, but they don't want anyone writing for them either. The only solution to the problem is to make the bet mutual or nearly mutual.
If this is done, there will be no reason for bans - except in legitimate cases - but also there will be no reason for bookmakers to set up games.