The accounts were genuinely FDIC insured. Evolve is a real bank.
But a few months before the bankruptcy, Evolve pushed Synapse to move the money into non-FDIC insured brokerage accounts. As far as I can tell, this was:
- a way to move a hole in the balance sheet from an FDIC insured to an uninsured place
- completely illegal, insofar as the only user consent was a manual opt-out, and some users weren't even sent emails about the change.