Yep, they did it on purpose.

Got unambiguous confirmation this change was completely intended.
This is all so tiresome. What was even the point of the dot red split if they're going to follow payment processor demands but worse even after it? (edit:) Part of the justification for putting up with all the problems it caused was that dot red would be "giving the rest of Civitai its own space to exist properly, without compromise." That's why we (or at least I) didn't complain too much during the change over: We were promised it would mean not having to do this thing. Now the site just does it even though it doesn't have to, what did we put up with all that for?