Seriously speaking it is hard to find a good bounty campaign because now a days there's a lot of scam campaign and it hard to predict if a campaign is legit or not but for me I follow some basis to consider whether a campaign might be legit. First of all is the content of the campaign if it is good then it is okay next is the number of participant if there is a lot of participant it might become legit and lastly is when the spread sheet is updating because if it wasn't then it might be a scam campaign.