Keep them coming.
I want other examples where it's appropriate for some brokers to restrict _buying_ but not selling, especially in the context of a short squeeze, with potential conflicts of interest.
I understand that brokers can restrict trade on risky items as yes, it impacts their risk model. I'm failing to find justification for RH and others to restrict buying but not selling of GME.
Your first link is for penny stocks, and the restrictions revolve around the usual pump-and-dump. You're allowed to go long, and can trade between days.
Your second link is for OTC, and I fail to see how this is relevant to GME. GME is traded on formal exchanges, and brokers that haven't arbitrarily restricted buying aren't having any liquidity issues.