Oops. Meant to leave my advice here a while back but must have slipped my mind. Anywho.
My genuine advice to better your site: I would first look into getting a different template. One main thing is that it doesn't stand out from others (standard 3 column shiftcode design). There's soo many of these. That's why I always advise everyone not to let shiftcode design your GPT site :]
More offers - I notice that the potential earnings are $142.60. I'd add alot more if you can find some good networks. Members will run out the first month and not be able to do anything next month.
sign up bonus - Do you have one? That's attractive for new members
The minimum cashout of $10 on there is good. People like low cashout minimums. I'd maybe think about adding a forum as well. With 35 members, you need to really focus on advertising. Advertise your ass off. Work 10 hours a day if you have to! It takes alot of work but worth it in the end.
Good luck you can do it!