Let me say this though, there will be always and I mean always a few users to click and claim even if they know it wont pay or they just don't know but will know soon.
What ever you do still going to be busy for doing manual payments.
What I really don't understand is why people are so fu**ed up that only way to live is to scam and lie, steal or be greedy and not pay users what they really deserve?
I mean if I could earn $200 a day I would have paid $150 to my users and make progress over time to even make thousands of dollars a day and still pay users more, when people learn that for long-term gain be trusted and respected is vital.