Oh it causes
Why would anyone put up with Reddit and its bazillion rules for any purpose other than self-promotion?
I'm so tired. I'll be so happy when I have a genius agent who promotes me for 10%, and I can just relax and go back to being a genius 100% of the time.
(I do realize that a lot of people probably actually spend a lot of time at Reddit for reasons other than self-promotion. But thinking about them makes me sad, like thinking about all those unpaid chumps who work so hard on Wikipedia.)