The one I use is called “Unpinterested!”, and is on both the Firefox and chrome extension stores. You can also use uBlacklist to block the domains.

I did the same thing with home assistant and just the stock clock app. Just looking at the “next alarm” sensor state.

Another place that’s got good deals is https://nationalofficeinteriors.com . Learned about this place at an old job. They sell used stuff that’s pretty much new but has like one little stain or scuff on it or something, so places making bulk purchases refuse it. Just doing a search for the Steelcase Leap (which I also highly recommend), they’ve got a bunch for like 50-70% off full price right now.

Mine’s “Abraham Linksys”

If they’re using a service to send the emails, like SendGrid or Mailchimp or something, that Unsubscribe survey is actually hosted by the email sending provider, and the more people that mark the email as spam or use the “I never signed up for this” option or similar, the worse it makes the user of the mail sending service look. If they used Sendgrid for example to send a mass email to 10k people, if more than 5% Unsubscribe or mark as spam or use the “I never signed up for this”, the company might get their account locked down by Sendgrid until there’s an investigation as to why they sent spam.