Why are there more fish at Party?

[Duck Rabbit]

I think it generally agreed upon that Party has the best games with the most fish. On the other hand, Stars is considered to have tougher games than Party. I am wondering what the reason is for this. They are both about equal in size. Is it because Stars draws more of a tourney crowd because of their better structures? Is it because of their advertising campaigns? (Stars has the last 3 WSOP champs and is 'place to improve your game'. Party has grandma's playing poker and people playing with blowup dolls.) I guess there is a difference in seriousness between the two advertising schemes. Any other ideas??