Placing a bounty on someone else's question tells the asker "I really want to see this answered". But aside from a single upvote (presumably) and extra traffic (which may or may not result in more votes), the asker is never really rewarded for making a question that someone feels is good enough to spend rep on.
This concept is to give the asker a more concrete bonus when someone else puts a bounty on one of their questions. Here are a few ideas:
+5Basically a second upvote, assuming that you'll have upvoted any question you've bountied.
+10Setting a bounty is a stronger action than a simple upvote.
+5%Same as the first idea, but providing bigger bonuses if the offered bounty is larger. Presumably only the best questions get the biggest bounties, why not reward them?
+10%If you're wiling to spend 500 rep on someone else's question, perhaps they deserve an extra 50 rep for writing such a question.
This commision would not be subtracted from the bounty amount; it would be generated from nowhere just like upvotes.
As a nice side effect, the bonus would notify users that a question of theirs has been bountied by someone else, which I don't think currently occurs.
This is a discussion, not a feature request. I don't know if we need this or want this, but it's an interesting idea so I put it out there.