My theory (which I included in my emails) was that I was receiving funds from people I hadn't transacted with before. For my wedding, I had requested money for a "housing fund", and many friends/cousins/parents'-friends/etc were gifting via venmo
Seems that Venmo thinks they should be enforcing sanctions against Cuban restaurants in the US.
I could also believe that something dumb my friend or I said was flagged by their systems. Unfortunately they won't talk to me, let me explain any transactions, or give any hints about which transaction caused the ban ¯\_(ツ)_/¯. I've never had any warnings either; straight to permabanned.
Salt in the wounds was watching John Mulaney's bit on venmo[1] the next week