I can't play on this site, but for those who can, I think this is interesting. Seems like all MTTs, or maybe just the big MTTs, have no rake. However, it seems like the buy-ins are the same, except the rake is included in the prizepool now. So in like a $10+1, you still buy in for $11, but that $1 is not eaten up by partypoker, it stays in the prize pool. It's only a promotion, but with no end date.
All tournaments rake free on PartyPoker now!