Raked hands

[Fmonti]

I was referred to a poker site by a friend and after I play 200 raked hands I will be awarded $50.00..Would someone tell me what is consedered a raked hand? If I play in 200 hands and those hands are raked by the poker site have I met the requirement if say I folded preflop on 80% of those hands? Or do I have to stay in the hand in order for it to be called a raked hand? In other words see the flop?? I had played about 60 hands and when I inquired via an email to the website they said that I had 15 raked hands...???