Didn't etrade and/or other frims do the same halting of GME because they couldn't cover the overnight options capital requirements?

Ultimately RH and others didn't have the ability to raise the crazy amount of capital they needed to cover trades over a very short time and instead of breaking these requirements and receiving the consequences (getting taken over by SIPC? or whatever, I don't actually know) they halted trading.

Failure to predict an unprecedented future, I suppose.