I just think rethinking your pricing would be a good idea! An introductory rate I would be happy with, to test traffic etc.
Even if you doubled your rewards I think that price is still a little steep. Anyway, I'm always trying to wangle a bargain so ignore me.
Just some stats for you from today (21 hours):
Normal payouts: 0.03652280
Referral payouts: 0.00428865
Users: 877
Payouts: 10388 (normal + referral)