Yes lots of them are flat out scams. Try to find one that has been around awhile. You wont miss out on a real bounty by taking the time to do some due diligence. Check out the facts they present if possible if not possible red flag. One I found recently has been around since 2014 so has been time tested not to be a scam. Marinecoín has a real bounty with real good pay. 20,000 .MTC. for completing artificial intelligence assigned proof of promotion work. Each successful completion equals 20,000 .MTC. so a lot of these are to be had with a little effort. The platform has value since it is for iot machine to machine applications. The bounty system is dev-less with ai depositing 20K straight into a functioning wallet no waiting. See for yourself here marineco.ín/ico