There were a few altcoins bounties last year from which I had earned a lot, can't remember the exact amounts but I had joined most of the bounties and I had earned a lot of money through bitcointalk from these bounties. I hope there will be another good season of the bitcointalk bounties in the future, so we could take a profit from it.
usually good bounties season coming alongside with bullrun of alts or you can say the altcoin season, since at that time most of the coins will have really nice valuation and therefore the allocated rewards for the bounty participants will definitely increase in value, i'm sure in the future things will be the same like before when in bullrun, there gonna be so many projects that is generous in giving the promised rewards mainly because the rise in value.