wait... what if I don't have an SSN? (not a citizen, have a us bank account)
It sounds like Privacy is falling into KYC territory and is not able to farm it off to the host banks. But then any limitations around requiring SSN are due to their implementation, and not to the KYC requirements.
Regardless all citizens are eligible and should be given an SSN if they apply.
I don't know if it's something you have to apply for, I was 20 when I moved to the US so my parent handled all the paperwork. Just wanted to float that SSN != citizenship.