"I think it's like a brokerage that has to post 100% collateral --- out of their money"
How is this not the customers money? You deposited 100% of the collateral with RH. Banks can take your money and make loans with it so the bank can make profit, but only so long as they have your money for you when you want to use it.
I'm pretty sure everyone retained their ability to get cash out of Robinhood, for whatever that's worth.
This is what r/wallstreetbets was after. Forcing people to buy at $1000+. Robinhood should've had collateral for people buying stock in all cash. If they don't they are basically a busted bank, and they cheated all GME holders.
When they bought the stock they had absolutely no reason to think the brokerages would stop selling shares.
They were selling call options that are in the money at $500, while simultaneously not actually allowing GME to go to $500. That is outrageous.
Right before robin hood shut down GME they closed people's positions out at a price of over $2000 per share. The holders literally broke through the sells and were forcing the short squeeze to happen. Robin hood then forced GME into the floor. That is absurd and should absolutely be illegal. It is a crooked casino. They should've been forced to close out everyone's position at the ask price, but they didn't want to so they cheated.
I don't think this is at all like a bank that won't let you withdraw your money. I think it's like a brokerage that has to post 100% collateral --- out of their money --- for every share of GME that you ask it to buy, doesn't have the money to post that collateral, and thus can't buy any more GME for you.