This thread is funny... All those members with different coloured avatar thingies telling you it's real yet you just can't believe it as you lack any common sense.
It's not free money btw... It's a bloody good business model, almost like printing moniez. They give you some money and tell you how to play, you play and generate rake, the poker room pays some of this to PS who for all your hard work teach you to play better so you move up in stakes and pay more rake so then they give some more of this to PS who then teach you to play even better so you move up in stakes... etc etc etc