Those sound like pretty routine credit card declines, to protect your card from unauthorized activity. When I was with Citi, resolving them was a simple matter

Those sound like pretty routine credit card declines, to protect your card from unauthorized activity. When I was with Citi, resolving them was a simple matter of calling their telephone number, and it would take a few minutes at most. I since switched to a couple of other banks and they both have similar procedures in place. The problem described in the Twitter thread is on another level entirely. As another commenter here pointed out, it sounds more like that one failed a KYC review of some kind.