Amazon CS is scripted and fairly stupid, just like CS for almost all companies. I suspect Amazon merely sends those ads out randomly to anyone for which they have an email address. It is likely not a sophisticated send out. If they have an email address, they send it out periodically. I've been a Prime member for years, but I still get spam asking me to become one.

I often get snail mail and email sign up deals from companies with which I already have a contract or account. T-Mobile and Charter Spectrum are bad about that. It is annoying that they don't filter out those who already have accounts and cannot receive the deal, but they don't.