Are you talking about bounty campaigns here? If indeed yes, I suggest you learn to see ICO projects more closely, because not all many scam projects are also good
It is just that a newbie comes when the projects are not trusted and just become scam after you do a task or just fail to achieve their goal. You have to study it deeply to analyze whether it is going to gain success and make sure that manager is trusted. Maybe it is a waste of time for not gaining but time will come that projects will be worth to support again.