>they ban you from the platform

Use a respectable platform that doesn't do that then.

Are you familiar with any? I know people who bet on sports for a living and one of their biggest operational challenges is keeping accounts unbanned long enough to make consistent income.

Polymarket.

There's no such thing. The house always wins or the business collapses.

Yet, Polymarket exists where no one takes a cut* as it all happens on a blockchain.

*there are small gas fees for sending transactions on the blockchain