I read somewhere that Sinatraa is with sentinels only because his contract says that they(sen) have to pay some crazy amount to terminate the contract so its actually cheaper for them to pay some small amount every month and wait for the contract to end. Its actually very logical cuz they also get to tap the sinatraa fanbase. From Sinatraa's POV he accepts it because he will be orgless if he leaves sentinels and anyways he gets enough money from streaming and endorsements so no money problem and he enjoys the sentinels clout. So kind of a win-win