Recently i took part in couple of bounty campaigns,and i though i can earn some decent amount through it...but it was a total waste...i took part in targetcoin and coss ico campaign and after 2-3 months i recieved the bounty which is worth only about 8 USD including both 
it was just total waste of effort and time
it was just total waste of effort and timeit really depends on the camapign that your joining because there are still some campaigns that pays high and sometmes you need patience to wait for the token to be listed on a major exchanges in order for it to pump. also joining a bounty campaign is pretty risky and needs luck because not all promising ico's are legit and will pay you after the camapaign has been finished.