Also, this one will opt out of catalogs that come in the mail, but you have to enter the information for catalogs you receive. It won’t stop them from coming unless they already come.
I didn’t dig deep into this, I didn’t like the idea of giving all that information to another website, but it looks like it’s run by the “the story of stuff” project & they used to be legit, so they’re probably not trying to get our info to sell it later. But I haven’t looked at what they’ve been up to in more than a decade so don’t just trust me on this.
For individual catalogs so you don’t have to contact them yourself: