Ok, let me explain. At the two sports books I have been using for awhile, YouWager and oddsmaker, I have a "host". This isn't a host like Mdawg or some high roller would have. I am sure it is just a rep, assigned to me. And when I am not betting they call and leave messages offering bonuses and rollovers that I don't see offered on their sites. Again, this isn't because of any high roller status, but contrary, because of my status as a losing player for several years.
So I was able to get good bonuses at low rollover, for each of these. Now after completing the withdrawals, and it more obvious what I was doing, I suspect I will not be able to get such a good deal, when I go to repeat. Maybe rollover requirements so steep, it will not be worth the effort. We will see when the time comes.
As for crypto. I don't use it. Just not familiar or comfortable enough, and not even that interested in learning more.