According to a recent trademark for P.S. Thanks, probably short for PlayStation Thanks, it seems that way. The trademark filed by Sony Computer Entertainment is for use with an “incentive rewards program” which identifies and motivates the top consumer base.
There are a number of ways Sony could incentivize their customer base. They could hand out points for each item purchased and reward frequent buyers with PlayStation products sort of like Club Nintendo. Or they could quantify top players by skill via trophies and reward them. The latter seems less likely since they’re targeting the “top consumer base” or in other words top purchasers.
What kind of prizes could Sony offer? Games seem likely, but if such a program exists Sony will probably throw in a few mega prizes. Last year Sony rewarded their fans in Southern California by passing out E3 invites at their PlayStation Blog meet up.