Just saw that a vendor on here (Supreme) saves his customer info and keeps it somewhere. Is this a common thing or is it just this one particular reseller? I'm a little worried becaused I've placed an order into AK's outfit and I'm wondering if this is common practice.
It's more common then it should be.
Good vendors only keep your info long enough to get your package to you.
Bad vendors think they're being clever by essentially keeping an incriminating ledger of their illegal activities that LE will use to add charges, for the idiotic purpose of blackmailing their own customers. LE doesn't care about end users when they've just busted the source.
Vendors that save addresses are stupid. Don't use stupid vendors.