It would be neat if you could get this to work. But I can't help but think anyone who launched such a service would end up spending most of their time adjudica

It would be neat if you could get this to work. But I can't help but think anyone who launched such a service would end up spending most of their time adjudicating disagreements about whether there should be a payout when a poorly stated question gets a low-effort unhelpful answer.