So yes, they can enforce their terms for all practical purposes.
But no, they cannot levy fines or put you in jail.
Those are the consequences that matter. I don't care if Microsoft or Google decide they don't want to be friends with me. They'd stab me in the back to steal my personal data anyway.
And that's the whole point of violating terms by competing with them.
I'd start a business but the whole setup is a government scam. Business licenses are just subscriptions with extra steps.