However, there are some restrictions. As stated in the terms:
Not legal tender except in localities with citizenship rights for unicorns
And, a little known fact is that Scotland's national animal, is the Unicorn. Also, I'm pretty sure Internetland allows them, 'cause they, like, for sure allow Unicorns.
The majesty of these animals is unparalleled, so I'm not sure why they're not allowed citizenship rights everywhere, but there you have it.
As long as you're operating in Scotland or Internetland you can accept Unicoins.
I apologize, but for technical reasons I cannot currently accept payments with Unicoins for this answer.