not all bounty campaigns are waste. You have to choose them carefully. Recent hedge token campaign was great in terms of campaign management and value of bounties collected. Also the campaign i am part of right now looks quite good. The guy running the ICO and the campaign is one of Iconomi DAA managers, and they had to bring 150k eur to the table of their own funds to get their position. I think that is quite a fact in terms of security and non scam regarding the ICO and also bounties about it. Keeping the long story short choose wisely and you can earn something.
You are right about that. Some can be jackpots in all the way, some even get you more then you are payed in BTC but this is hard to pick when and which one is good one.
ICOs now dictate this trend and its very hard to know and to choose the right pick in this let call this mess. We have several pop out every day and to be honest you need to risk to get some in return.
Some other people earns huge money for the altcoin bounty campaigns and some of the people fails, so let just think that joining on camps are so risky but we cannot earn huge if we cannot go by them. And to get a higher chance to earn for good instance then we make sure that we are in a good campaign so that we can earn huge bounty and our participation will be worth for our time spend on them.