Well, i see no point asking when you already know all the answers to your question,
But all the same, initially I left bounty on bitcointalk bcus of the numerous scam projects I participated in which in the end pay hundreds of thousands of tokens but when listed on an exchange, those tokens amounts to nothing, i wasted my time and data on promoting useless projects for over one year without gaining up to a 100 usd, that's I I left and am back at it again, and this time, I research every project very well before deciding which to join their campaign.