And many members are promoting such project? The good projects are over or I'm missing something?
Yeah and don't be surprise. Those are bounty abuser and they don't even know different between a good and a bad projects. Now days it's rare that a good projects running their bounty event. Of course you missed some but be patience you'll get next one. 
Aren't there bounty projects that list on gate.io, binance, okex, huobi ? ChainX, p2pb2b, exmarket and others like these exchanges will only drag the project down, are bounty hunters blind or just too stupid to do research?
Last year we saw some projects which listed on binance, kucoin and other good exchanges. This year just started so be patience hope good quality projects will come for us. And of course people should more careful about those projects which are running their ieo in shady exchange like ChainX, p2pb2b, exmarket (in my little experience it's just a waste of time). So be patience and work for good quality projects even if you have just one single bounty.