Relevant to yesterday’s Robinhood actions in $GME? That they were not being blocked from entry at ETrade, contrary to what RH and WeBull were doing and contrary to some reports lumping ETrade into “the conspiracy”.

I wasn’t in GME, but I want to know how my broker is handling unusual market conditions.

Especially in "order flow" schemes, brokers accepting trades but either not executing them or executing them at different prices is a commonplace. It's great that your experience at ETrade has not included this, but if you ever decide to actually trade a "crazy" stock the outcome might be different.