[upstarter]

> "do this for me" VS "answer my question"

The boundary is probably not always easy to define. And so I would ask myself - would there even really be a need for such a boundary? Why not simply increase the reward, if your question/problem is bigger than most?

[notafraudster]

Well, in this case, you're describing Fiverr with a slightly better user interface for the hirer and an incomplete contract problem (because you expect someone to do the work before you award the payment, and also reserve the right not to award the payment). This is fine but it's basically something we already have.