> I am not sure if the subscriber base is technically illiterate or users that hold a given coin have a strong incentive to dismiss any criticism.

Why not both?

Most of those crypto currencies smell like MLM schemes for people who scoff at housewives doing the same with physical products. Get rich fast at the expense of the late comers, you can do it! Start by getting your family and friends in it.

The old goals of making a decentralized money to fuel revolutions disappeared fast once the only users ended being pure criminals.