Did you read the whole post? He got paid on the RCE.
I realize a million is a bit unrealistic, but if you're going to make a public statement, at least back it up or prove to the guy why his findings don't constitute a "million-dollar bug". It's not right to just cold-shoulder the guy and hide behind vague rules that were never clearly outlined. In fact, you might even conclude Facebook brought his behavior on themselves by making such a statement as "if a million-dollar bug is found, we'll pay it out." $2500 is nothing when you're thinking $1,000,000
Yeah, the researcher went deep into the grey area, but I find Alex Stamos's reaction barely short of unbelievable - it's almost as though he's so new to the internet he's never heard of the Streisand Effect... (Either that, or he's just so accustomed to bullying and intimidating people who might embarrass him that he's now got that corrupt politician "Waddaya mean I'm 'abusing my power'? We grant multimillion dollar contracts to old school buddies all the time? What's the problem?" look on his face.)
A script to create new bogus accounts on Facebook is probably worth more than mass Facebook account compromise.
People really don't seem to understand how the "black market" works.
(But yeah, I'm perfectly happy with my life where I have no real understanding of how the black market for this kind of thing works...)