I have participated in many bounties and continue to do so. But among all the campaigns I can single out one Edgeless, I think many remember the generosity of developers.
That is true, some people collected close to 25000 edgeless tokens, which is like 2.4BTC at todays price, that is huge $20k from a camapaign, there are other projects like Matchpool that rewarded bounty participant very well also.