indeed many scam ico that stole the investors money. but not all ico are scam.
if you manage to invest in a good ico, you will have great ROI later.
I joined a lot of bounty campaigns since last year on 3rd quarter and until today but unfortunately half of them went suddenly gone, stopped or suspended and half of them are indeed paying but half of my altcoins in my wallet have still no value until today.
that's why we couldn't always rely on bounty campaigns and the reason why most of the bounty campaign participants are having multiple forum accounts in order to join as many bounty campaigns available.