When you go to optoutprescreen to remove your SSN from the list to get obnoxious pre-approved credit card/loan offers "Opt-In" is automatically selected and must be manually changed. As if you went
Stop Junk Mail For Good With These 4 Steps | HuffPost Life
4 Ways To Stop Junk Mail
5 Easy Steps to Stop Credit Card Junk Mail - DeleteMe
If you're tired of receiving credit card offers in the mail there is a number on the back to opt out : r/lifehacks