Slightly OT: I signed up for the IFTTT newsletter a long time ago, in hopes to find out what people use the thing for. Turns out it's impossible to unsubscribe from that newsletter, which disqualified the whole service in my eyes.
1. Logged to a google spreadsheet when I enter and leave a radius around my work. I have to log hours worked, so this gives me a starting point at the end of the week for when I was physically here.
2. I get a stock price emailed to me when the market closes. I own a few shares of a single company (lowers my auto insurance premium, and keeps my engaged in the market), so this helps me see day-to-day changes.
3. I get the weather pushed to my phone at 6am every morning, so it is there on my lock screen as I'm getting up.
4. I get an email every time someone goes into space. SPACE.
Does this link work for you?
https://ifttt.com/emails/unsubscribe?email_type=newsletter (visiting this link unsubscribes you if you're signed in)
That is not an unsubscribe link. Unsub links remove you from the list without having to log in
One of my more annoying frequent inbox flyers is a newsletter from some website or other that says I need to log in to change my preferences.. only my account there must have been purged as they have no record of my email address (the exact email being sent the newsletters)
Sites - just provide easy one-click unsubscribe links, chances are it'll improve your open/click rate as you're letting people who aren't interested sift themselves out.