To answer the question. Unicoins are the method of currency in the evil alternate universe, where the good guys have goatees. Obviously the appearance of the unicoins in StackOverflow means a rift in space and time is currently occuring. I just saw my mom without a goatee walking around with a 3 barrel shotgun... a 3 barrel shotgun! obviously my alternate universe evil mom.

Luckily in the alternate universe they don't have good QA as I tried buying a tag with bacon and it wouldn't let me. We're safe, for now.