I signed up for rakeback on fulltilt a year ago and just now started playing at fulltilt with that account. Ive been playing for about a week and its still showing $0 credited.
It depends on which site you get rakeback. Raketherake pays every week on either Thur. or Fri. but some of the others only pay once a month and you have to waite until the middle of the following month before you get the credit. Hope that helps ya.