Hello Immanueldk,
There are generally 2 different types of poker rooms; rooms with loyalty programs and rooms with rakeback. Rooms with loyalty programs such as Mansion or PokerStars reward players that stick to the site for a long time and maintain a high 'VIP level' there. The points you earn there can then later be exchanged for money.
For people that have a high VIP status and play a lot at such a site - they bonuses gained through such a VIP program can be much more lucrative than a rakeback deal. A very high Mansion status combined with longterm play can net well over 50% 'rakeback' for example.
In contrast to this are sites such as Full Tilt which offer rakeback. This is then paid out once a week or month and is usually at a fixed rate such as 27% or 33% at Cake.
PokerStrategy always strives to give our members the highest level of bonuses or rakeback possible. So no, we don't keep anything but also give rakeback at sites where this is possible. So if you sign up through us you receive rakeback + PS points - while signing up at a rakeback site would only give rakeback.
The sites on which we offer rakeback are;
Cake Poker: 33%
Full Tilt: 27%
InterPoker: 30%
PokerHeaven: 30%
Betfair: 30% to 37%
On the other sites there are loyalty programs which are compareable to rakeback. You of course also take full advantage of these through us. You can find more details here: The First Deposit Bonus Guide
Best regards
SoyCD