[ivankirigin]

Tipjoy stopped giving PayPal as a payment option because of some limits in place that make their checkout experience really awkward.

On the regulatory side, I'm not sure such a toy app matters all that much.

A larger site like longbets mandates that the gifts get sent to a charity: http://www.longbets.org/faq

That could easily be built into birdbet too. From longbets:

  How come I can't keep my winnings?

  You keep the most important thing, which is public credit for winning your Long Bet.