You worded that better than I could have.

I ignore most of my vendor's emails because they're simply trying to spam me at this point.

I was also thinking that salesmen will cold-call/email me at least three times before they give up. People with whom I have no business relationship try harder than a corporation taking someone's money.

Welcome to modern economy. This applies to B2C, and as we can see it, B2B too. Getting a new customer is all the shitty vendors care about. Keeping existing customers is apparently just cost.

I went to a conference in 2018, gave out my work email. Still get pestered by them

Plus, many companies abuse what I assume is an exemption to spam rules by pretending that their marketing emails are “service related”.

Xfinity is the worst about this. They’ll send me a so-called service-related email exhorting me to download their app. Same with Capital One and their monthly emails asking me to turn on automated texts.