Maybe Game, but that's because his decline in the mainstream has already sank in (he has a pretty big online presence though), little to do with what YMCMB can do for him. If anything, features on YMCMB projects will keep his name in people's mouths for a bit longer. He'll be fine either way.
Busta is an OG, and has maintained relevant for a time 99% of other rappers couldn't even dream of. He's still caking off of different deals and venture that keep getting thrown his way, and every time he comes back he has some song that resonates somewhere. I don't know what the ideal situation for Busta would be, but I don't think it necessarily hurts him financially as long as Baby isn't dipping his hands too deep into his earnings.