So, I just wanted to add: as posted earlier (https://forums.eagle.ru/topic/274752-cubesim-protection-of-money-just-a-heads-up/?do=findComment&comment=4811227), I've waited about 7 months.
But the screens did finally arrive!
Granted, I had to pay another 120 fucking Euros in fucking import taxes (bloody hell!), but at least they're here and seem to be working (haven't had any luck with drivers, so they are still unrecognized in the device manager).
So yes, CUBESIM is the real deal and not some hack. His "fame" just seemed to take off after some YT reviews and Reddit posts and so he had WAY too much success, so his backlog is intense.