You'll probably notice this little image on the right sidebar.
If you click it you can buy things in the unicoin store.
This is just a gag, for the day (April 1st). Do not be alarmed...
Tch. Obviously a shameless marketing tie-in...
Adult Swim will destroy Stack Exchange in patent court over the association:
Unicorns, okay, public domain.
Rainbows, okay again -- public domain.
But unicorns + rainbows == infringement. Everyone delete your account now before you become a liable party.