I think that you're wrong on both accounts.

First (and perhaps least wrong), I don't think playing style has as much of an influence as you think. It isn't as if the best SNG players in the world choose to play on Party because they don't have the ability to adapt their playing style. Perhaps an inability to adapt YOUR playing style results in a higher $/hr at Stars for you. And yes-- I really think that the best SNG players in the world are at Party.

Secondly, I think that it's wrong to say that Party's structure is designed solely to screw the player. It's a mutally beneficial relationship. PokerStars even had to create their "Turbo" SNGs because of DEMAND, and a desire to try to compete with what was by far the most popular format.