[0] https://support.link.co/questions/where-can-i-purchase-crypt...
Only the on-ramp side needs to be in the US. The off-ramp user can just use their exchange.
Sorry "experiencing a temporary liquidity problem in the wake of FTX"? Or "suspending withdrawals temporarily"?
Even in the good times there's been no shortage of horror stories about exchanges not honouring withdrawals and ghosting customers, but now the exchange might not even be there next week. Your deposit might be considered part of bankruptcy proceedings and get rolled into general creditor compensation as part of a multi-year wind-up...
Personally, I think the risk is low enough for them to hold onto my assets for a few days/minutes (depending on method/direction) while transfers are completed.