@k00b, I'm a bit surprised that the implementation doesn't have more incentives for the OP who offers the bounty to follow through and pay once someone has helped.

As I was reading the post, I was expecting at some point that you would describe that the bounty money goes to some escrow, or basically is taken away from the OPs balance, and OP can't get it back. That way, OP is motivated to actually give it away to a good child comment.

The only drawback I see to this is that, if OP asks for something and no one delivers, the OP would have to part way from his sats without getting his request fulfilled. The only option that comes to mind to counter this would look like this: instead of have the entire bounty be taken away from OP forever, make a part of it refundable. This basically enables a gradient in the trade-off between the two extreme options (fully escrowed bounty vs no escrow at all).