I received my Full Tilt rakeback for October and I was a little shocked. With most (and I thought all) sites the rate of clearing bonus is greater than the rakeback rate offered. When I actually had earned rakeback on top of the bonus cleared I realized just how anemic Full Tilt's bonus policy is.
I am getting 27% back at Full Tilt right now and that seems to be the best rate going. If your serious about using poker for some amount of income generation you owe it to yourself to look into rakeback offers. With the number of sites available dwindling for U.S. players the days of bonus whoring are quickly fading. Rakeback offers you the ability to maintain income generation for the life of your account, just like a recurring monthly bonus.
I've done business with several sites and I recommend you check out RakeBrain, PokerSourceOnline, or RakeFreeze.
(If you sign up at Rakefreeze please use lifesagrind as your referal.)