I joined to many bounty campaigns. But many of them are scams. When I joined to a campaign, I check number of participants, advisers, community chats, and many things. Then bounty program is running normally. But after few days there is no updates in the spreadsheets, no replies from admins in the community chats. And finally they delete their community chat groups. So I have heard by some of my friends, they also have joined and waste their time with this scam bounty campaigns. So I think we need to talk about "How to find a good bounty campaign"...
Just checking the number of participants won't actually help. They can fake the numbers. Or there are other users like you who has no clue that they are going to be scammed. Why not just buy the some reliable tokens or crypto currencies and hold it for a long term? You will be making better profit from it and won't let you down like those scam bounty program does.