If someone gives away lot of his reputation points for his questions (using bounties) he should get the badge "big spender" or "seeder" or "motivator".
I like the [venture capitalist] as mentioned by ~quack.
The rules might need to be something around gave more then 300 reputation on more then 3 bounty questions however, otherwise it will be easily abused.
The flip side is people not understanding bounties, especially the loss of ability to accept an answer in future if the bounty expires. This may be a reason not to introduce the badge.
In the spirit of "badges are to encourage good behavior," I don't think that bounties should be arbitrarily encouraged. They serve a very specific purpose. If there was a significant increase in the number of so-called "featured" questions, that would detract from those that actually need it.
According to the podcasts, bounties are only supposed to be used after you put the effort into getting the question answered yourself. If you don't get an immediate answer, you are expected to improve, clarify, and document your continued efforts...first. That's why there is a 2-day waiting period to add bounties.
I don't think we should be encouraging bounties as an end-goal of giving away reputation or earning accolades.
I totally support badges for people starting bounties, for the simple reason that
- Bounties are great
- Badges are great
- I'm going to get one right away! (about 2,500 points spent on bounties and counting!)
Make the thresholds high enough and the danger of abuse - i.e. frivolous questions impossible to shut down because they're a bounty - will approach zero. No up-and-coming SO'an is going to spend their precious points on a silly bounty badge. And the few dedicated badge-hunters who are going to start bounties because of the badges I trust will be able to come up with an intelligent question - otherwise they have no business collecting badges, anyway.
I have suggested exactly this last August and have no response as of yet... obviously +1 from me!