I "love" the ones that randomly decide to reactivate literally years after unsubscribing and never interacting with the business again. The other day I randomly got an email from a yoga studio I once bought my wife a gift card from. We moved and neither of us has been there since 2021. Why on earth am I suddenly getting spam 5 years later. I get similar messages from hotels many years later too. Sometimes ones I didn't even end up staying at, just browsed. You can sense the desperation through the monitor.

I now militantly use apple’s “hide my email” function for this reason, though it doesn’t really work when you “need” to give your email address in person (I have a “junk” email address that’s normally turned off on my devices for those people)