Maybe not 3rd party spam, but definitely first party spam.
I gave a custom username email to a in-person store (big chain) with a rewards program because they were offering a huge discount if you did. Since then they've sent at least 1 email a day, with an average of about two (I've redirected all their emails to a folder I never look at). Which is a particularly remarkably obnoxious rate of sending emails...
I've also split my email addresses in to a public one (displayed in my profile here, on github, on a website, etc) and a private one. The public one gets a spam email or two a week.
Incidentally, I was surprised to discover that pinterest forbids you from having the word pinterest in your email (or did when I signed up).
I've encountered many companies that let you unsubscribe, then add you to a 'new' mailing list a few months later. You can usually identify these companies because when you click to unsubscribe they take you to a page with a dozen or more 'newsletters' that you have to uncheck to remove yourself from if you can't find the 'all' link.
Unsubscribe also frequently doesn't carry over when a company is sold to another, who then harvests every email ever mentioned anywhere to send new spam to.
Because it's faster to set up a custom filter than search in the email for a link... I couldn't even tell you if there is an unsubscribe link (I mean I suppose I could go look, but I definitely never did).
Also after getting home and already having multiple marketing emails I was sort of curious about just how many they were going to send, which is why it's in its own folder.
I had custom filters for a while but I stopped using them, it became unmaintainable and caused some false positives.
I then resorted to unsubscribing, but in my experience that doesn't always seem to work. I could be wrong here as I haven't kept track of who I unsubscribe from and if I would still get newsletters after the fact. But I've experienced receiving newsletters from some company I could've sworn I just unsubscribed from a few times.
However it wouldn't be surprising if some website's unsubscribe feature was buggy. I can also imagine it's not being reported. Or if it was it, and you could figure out where to report to, the report would get lost on its way customer support to the people responsible.
I wasn't counting 1st party spam as spam because in many cases I like the information I get (usually sales on things I buy). I should have pointed that out in my post. Thanks for making the distinction.
I gave a custom username email to a in-person store (big chain) with a rewards program because they were offering a huge discount if you did. Since then they've sent at least 1 email a day, with an average of about two (I've redirected all their emails to a folder I never look at). Which is a particularly remarkably obnoxious rate of sending emails...
I've also split my email addresses in to a public one (displayed in my profile here, on github, on a website, etc) and a private one. The public one gets a spam email or two a week.
Incidentally, I was surprised to discover that pinterest forbids you from having the word pinterest in your email (or did when I signed up).