One time, like a decade ago, I went through my inbox and clicked all the unsubscribe buttons from the previous month. The quantity of junk mail I got over the subsequent month exploded. I'm pretty sure the majority of the time you click an "unsubscribe" button, the person you're unsubscribing from sells your info to other companies with the "this is a real living person, they clicked on our button" label. I just put everything in spam now. I don't trust anyone.