Originally:
> Gemini is a U.S. company regulated by the New York Department of Financial Services. GUSD reserves are eligible for FDIC insurance up to $250,000 per user while custodied with State Street Bank and Trust.¹
Later:
> Gemini is a U.S. company regulated as a limited purpose trust company by the New York State Department of Financial Services. Each GUSD corresponds to a U.S. dollar held by Gemini in accounts at U.S. FDIC-insured bank accounts and money market funds holding short-term U.S. treasury bonds and maintained at a custodian. The cash portion of these GUSD reserves may be eligible for FDIC “pass through” insurance for Gemini customers, in the event of the failure of a bank holding the U.S. dollar deposit portion of the GUSD reserves.
[1] https://web.archive.org/web/20211201224824/https://www.gemin...
I'm also reasonably sure that the FDIC insurance stuff was more prominently displayed on their site, though I'm having trouble confirming that so maybe I'm just misremembering.
And indeed, I have helped a few people avoid these scams now. When friends of mine ask me about investing in crypto now, I tell them "I think you should buy Treasury Bills directly from the government for safe short term stuff, and probably just find a good low cost index fund from a registered broker for longer term stuff".