Interpoker/Intercasino has a $90 matching deposit bonus each month. It used to be easier to clear the poker bonus at lower limits because a raked hand counted at $.25 rake. Now you only get 1/4 raked hand for that, and a full point for $1 rake.
Since Interpoker made that change, I have found it more advantageous to clear the bonus at Intercasino, their related site. You need to wager $2250 in the casino to clear the bonus. It takes a bit of time, but I manage to clear it regularly playing $2 blackjack.
Some of the other Cryptologic sites like William Hill, UKBetting, TotalBet and RitzClub have pay-for-play poker bonuses for the first 5 hours played each month. This is in addition to the prop-play offers available at all the Cryptologic sites.