Unless, the retaliation is done by the NSA where they don't want any more of their precious 0 days getting leaked.
NSA guy #2: "Sure, let's release our Google zero day!"
#1: "Oh, but didn't we spend millions on that?"
#2: "Yeah, but it'll really screw up Google!"
#1: "Okay, do it."
Google: "Oh my, thanks for pointing out that exploit. We're so glad the NSA is getting back to its mandate to alert American companies and organizations when it had identified security holes. And....fixed. Let us know if you find any more!"