A user can also add fund using crypto currency to the wallet and use the wallet to complete the payment.
On every month 5th, we conduct live lottery draw via YouTube/ Facebook. We select 75 random winners for our 3 jackpots.
As I can see, the poll answers your question unambiguously.
However, I would not be so pessimistic about proposing such a prize. I think the question is, is this lottery provably fair?
It is certainly important whether it would be a bounty pool (if so how big) or foxed number of ticket per user.
If the value of the tickets was large enough (it would have to be much larger than the standard bounty), then I think there could be interest among users.