The Direct Marketing Association provides a way to get off of many mailing lists all in one go. It’s free if you register by mail. It costs $5 to register online. How much sense does that make? Clearly, registering online is going to save them time rekeying and verifying information. Goofy.
I did notice that when you fill out the form to mail in, they assign a tracking number… so at least they’ve got it set up so they only need to rekey the tracking number.