It was TheMagpiesEyeCo on Etsy. They only sell epoxy buttons, but they have a bunch of different kinds.

You think it’s big now, just wait until July. Reddit’s api changes are going to force people off of the site in droves. Right now it’s a lot of noise and some movement, but a lot of the regular user base hasn’t actually felt any effects yet. Once the changes make the site unusable for a lot of people there will be a lot more.