Percentage is usually by agreement.
If no agreement, then the typically hourly rate, which should be paid by the plaintiffs.
Yes, true.
I had a legal agreement that should there be a lawsuit each party would pay their own attorney.
The other party tried to hide that agreement and have me pay their attorneys; at least they didn’t ask for 10% of my net worth.
The judge didn’t like it much when he found the other party lied about the existence of the agreement.
The judge threw out the agreement Tesla had with Musk. It would be fair game to throw out the lawyers agreement and give them $1.
EC