I just saw some article talk of a silicone valley entrepreneur offering free coins for your iris scan, imagine what or this data collected could affect you and me in this future should you sign up...am certain our governments will be interested parties into such because this is data that can't be easily changed so do such projects have data protection rules and laws to follow and what guarantee is there that they will not sell this data to third parties for their own financial gain??
So the Silicone valley entrepreneur is giving out cryptocurrency and collecting these information and it is strange that there are people who are willing to provide these sensitive information for a few pennies. There is no guarantee that they will not be reselling those information and you cannot take any legal actions against them because you are willfully selling your information.