Bounty campaign only profitable in 2017 and in the beginning of 2018, and after that this job not really promising good reward because too many ICO that has low quality product. So ICO market turn in to low demand and the trend of crypto market also in bearish mode. Bounty campaign maybe profitable job again if the market back to bullish trend.
bounty campaign always be profitable thing.we didnt need spend any money and we get free money, although its amount small.compare it with ico investors, they spend much money but unfortunately they get much loss.