Conspiracy or no, the end result is so far from your day trading 25K minimum example. Your example is a rule that already existed going in, rather than a rule that changed temporarily to convenience one side for a day.
Ok let's say I'm a retail investor using RH. Why should I need to divine what my brokerage is doing from Twitter posts and Reddit? My should I need to wait hours for their explanation that comes in the form of a handwavey blog post?
My point was that a mob formed instantly with false narratives about what was happening. It’s clear now that these moves are entirely due to risk mitigation and that it had nothing to do with collusion with Citadel to cheat people. So the conversation has shifted from outright collusion to cheat retail investors to one of terrible communications.
People don’t seem to realize that brokerages do this all the time to limit their risk. If you have less than $25k in a trading account for example, a brokerage is mandated by law to not allow day trading (that is entering and exiting the same position on the same day). Do you know what happens if you do? You are labeled a pattern day trader and you can only exit positions. Actually the fact that they were letting people exit trades was a big clue to me that this was risk mitigation while this collusion with citadel narrative was making the rounds.