Whether it's CH7 or CH3, they both have their faves, they are both biased. It just happens that CH3 treats all their faves right, meanwhile CH7 loves men lol most popular ones stay there a while, I think Mik just signed a 5 year contract.
CH7 only has a handful of girls they like, Mookda, Pinkploy ect meanwhile CH3 treats all their popular ones good and they get good CFs and international popularity more due to availability and channel strategy. The fact is CH7 treats most of their stars as disposable, yeah they might go elsewhere and be successful like Baifern but most don't like kwan ect and even If they leave CH7 can just make someone rise to the top again, it's sad but the business is like that. Both channels don't treat their stars that well only the lucky handful.
Moving channels is just a career move and it might or might not work out because the celebrity pool just keeps rising but not the number of channels, and I'm not sure there is exclusive online things like China and Web lakorns. So it's risky, the career is risky, fleeting, based on luck and I wish everyone the best.