There are a ton of high stakes players that played on Party skins to get the rakeback. It sounds like some of them will be moving to places that will continue to give them rakeback. When you play $50-$200 Sit and Gos you definitely notice that a lot of regulars are missing. That just means there is less competition for me at the moment!
I would still think that playing on Party with unlimited fish would be better than playing on a smaller site with rakeback.