Gotta love the business model of FTX, Coinbase, Binance (and all US retail brokers): receive money from clients for the purchase of securities, deliver nothing in return unless you feel like it.
When your fraud moves against you, you can just restrict buying or selling or all trading until you're solvent again. All good. No biggy.
1 guy at FTX went to jail, I hope (for the future of the US) that there are many to follow.