Don't compare now with 2016/2017, at that time investors make better profits from ICO projects and lack of exposure to scammers makes it scam free at that time but things change drastically when bear market took over and more scammers find their way into crypto space, we really can't blame investors cos its not east to lose money to scammers
Its not totally scam free in that year, there's a lot of good campaign that year which becomes the reason why the trend regarding bounty campaigns increases. after it makes a name for almost a year, scam campaigns emerge in this forum like a mushroom. The year before, we can rarely seen a scam campaign, most of the campaigns were build before become a solid project and have a good reputation these days.