I have read on this forum that in 2016-2017 there was an altcoin boom and the coming of the ICO brought with it some good bounties that earn hunters good returns but in recent times there have been a lot of scam projects that may never make it to the exchange but conducting large bounty programs that become worthless so I will not advise anyone to go into bounty hunting because it doesn't pay and even if it does pay it will be a peanut that can not profit the user with a true value for their time or money.
Still not all bounties campaign scam but have few worth although with lower reward trough in 2016-2017 above $2,000 each campaign reward for participants. Last 2016-2017 many participants interested with altcoin bounties campaign than joining with signature service campaign because altcoin can pump drastically when listing on market, but when many ICO failed reach hard cap almost all altcoin bounties campaign have drop and several become scam without payment yet.