I must have misremembered. They were flagrantly violating some rule for months, and the million variants of the sub name were part of it. But you misremember too. T_D had not been "locked", unless you're talking about the quarantine in which case you make it sound like the same people that did it as moved to thedonald.win. Meanwhile r/ConsumeProduct and r/GenderCritical were huge losses, with no actual rule violations to cause them, aside from a few AHS brigades.
No, people weren't allowed to post submissions there. That's what I mean by locked. I guess I should say "restricted mode" instead. From wikipedia:
"On February 26, 2020, Reddit administrators removed a number of r/The_Donald moderators "that were approving, stickying, and generally supporting content in this subreddit that breaks [Reddit's] content policy" and called the remaining moderators to choose new ones from a list of Reddit-approved individuals. About the same time, Reddit placed r/The_Donald in "Restricted mode", removing the ability to create new posts from most of its users. Since then, some users of the subreddit had moved to theDonald.win, a separate site based on Reddit's old user interface."
Reddit admins did the same to Chapo before it was banned too. They replaced a bunch of their mods, chapo just kept going though, with some new rules and stricter moderation to try and stay unbanned.
So, what I said then. You were making it sound like the same people jumped ship as implemented those policies, and in fact they were the opposite sides. And restricted mode isn't locking; everyone can still comment, there's just a whitelist of who can make new top level posts.