Today I found this strange Unicoins advertisement at my side bar on PSE, which puzzled me a bit. Seems there is someone trying to lure people into paying real money for a couple of "optical enhancements" for this site. For me, it looks like a new form of spam. Is this officially approved by the stack exchange network?
Stack Exchange Inc. does not endorse or encourage behaviors that should not be endorsed or encouraged. Not legal tender except in localities with citizenship rights for unicorns.
I think they've done a good job of full disclosure and we should allow stack exchange to be a magic pasture all uni*s can play in.