Badge for bounties offered?
I see there are bronze badges for first bounty:
AltruistFirst bounty you manually awarded on another person's question
BenefactorFirst bounty you manually awarded on your own question
InvestorFirst bounty you offered on another person's question
PromoterFirst bounty you offered on your own question
But there are no silver/gold badges for giving out bounties repeatedly.
I just saw this guy that gave out bounties generously, not only on his "primary" account where he had lots of rep points to take from, but also on some of his accounts where he had not much more that the 100 points he got initially from attaching the new account to the same user withtin the SE network (because ha had >200 point on another account). This resulted in he having left only 21 points after giving a 100 point bounty! (see this question on Music SE).
On his biggest account where he has high rep, he has given out numerous bounties.
I think this kind of generosity should be awarded with more than a simple bronze badge for the first one.
I think Silver for giving bounties total worth of 2000 points, and gold for total of 5000.
Maybe even an additional gold badge for giving a bounty that takes you back more than 70%, which will be a big sacrifice on the account rep points.
I think maybe the silver and gold should be only for questions you don't own yourself, because this shows effort to promote other people's questions. Promoting your own questions does not need the same initiative.