I agree, for every 10 scam projects there maybe one legit project. But that one legit project maybe enough to makeup for all the scam projects. Keep researching and find the gems.
That may be true. But for that, at least 10% of the bounties should give rewards to the bounty hunters. But the current success rate is extremely low, and it can be as low as 4% or 5%. That means that if you work on 20 or 25 bounty campaigns, you may get good rewards from one campaign. It can depend on luck as well. There can be cases when a particular user participates in 50 campaigns and still goes unrewarded.