He resigned because game theory people.
That's what his statement seemed to imply. Of course it's nonsense, but it's certainly a nice change from the "spend more time with my family" your people are so fond of employing.
I don't actually see the point in firing him, personally. To me it appears painfully clear that it is all over now, and that everyone is playing along with some pointless charade where all sides apparently pretend (or have deluded themselves into thinking) that some kind of agreement is possible.
The Greeks ought to spend every available minute working towards the reintroduction of the drachma. The Europeans ought to spend their time preparing for Grexit. Apparently, however, they all seem to be seeing something I don't.
Varoufakis will, of course, be all right. He'll sell a lot more copies of his book, write another, probably try to challenge Piketty for the title of "Most talked-about leftwing economist", get a column in some paper- the Times
, perhaps, go on the conference circuit, and end up with a cushy visiting professorship somewhere. None of which, of course, will pay in drachmae. Probably won't do too many paid talks, though- neither the left-wing nor the iconoclastic thing to do.