I know Trio and several other Boss Medias previously had bonuses that were released upon completing a certain amount of raked hands, contributed or not. But recently, I believe they have changed this to what amounts to a rakeback.
In other words, Trio gives you a 50% rakeback, up to a max of $100, at the end of it.
And the other place you mentioned, gives you about a 28% rakeback, up to a max of $200, in $10 increments as they are earned.
I think this is what it is. I agree, it gets confusing. I wish they had the old system of "any raked" counting towards a certain amount.
I'd say about a year ago, most had bonuses that were cleared $100 for 500 raked hands. Not no more. All the little bonus whores took care of THAT. Although I believe a few still have $100 for 1000 raked hands.