all gamba streamers have a deal, nothing is wrong with that imo, but it depends on the type of the deal and whether they are transparent about it.
some keep a % of ending balance (with a max cap ofc), some get raw balance to play with, if they win they can keep the full win, and then there are those with fake balance who get paid a monthly salery to stream.
anyway, there is this handy website that list a bunch of those streams and they check and verify what deal they have:
https://tanzanite.xyz/creatorsEy man great info you drop here.
I dont understand so much how it measure because i only see graphs about the metrics form the streamers about how many views they have and about the deal i only read something about if they need to do wagering requirement and other related things, but not personal numbers, which i think they are in private and cant be disclosure.