H.A.F.
a.k.a. Rusty Nails
Not really a good way to have a secure lifestyle, and groceries.but either sign a one fight deal each time
They sign contracts. Period. If they want to renegotiate a contract, it happens a lot. But the contract holder can always say "fuck you" and have all the legal backing he needs.
Now that most other pro sports have hit a decline in people giving a shit due to their decision to play woke games instead of sports - watch the multi-million-dollar quarterbacks (for example) start having to renegotiate their contracts down - for the good of the team.
One thing the gubmint pushing "essential" this and that did was make us realize that none of these entertainers are essential.