I just don't get it. If it's unlimited - in what universe is using it beyond 15TB considered abuse?
I get the reseller part, I get the stupid chia mining part. But if they can say that was the problem - then get rid of those users, as clearly you have already identified them. Don't shift the blame away from your dumbass marketing team onto your users and play an innocent company.
I can't believe how much support dropbox is getting. People seem to accept, without questioning, every bollocks pr statement these days.