He wasn't guessing. He didn't look the guy up on LinkedIn.
I don't really see how else you can interpret the defense "he has written blog posts that are used by Synack for marketing purposes".
And it's pointed out all over the thread, but no part of "the researcher signed up for the Facebook bounty program as an employee of Synack and used his Synack email to communicate with Facebook" is uncontested, nor is it supported by the text of Alex Stamos' response. You've just read in what you want to see.
> He "assumed" because the researcher signed up for the Facebook bounty program as an employee of Synack and used his Synack email to communicate with Facebook. He wasn't guessing. He didn't look the guy up on LinkedIn
This is a load of bolony / ass-covering by Alex - Facebook's bounty program explicitly deals with individuals only, not companies and Alex knows this. From https://www.facebook.com/whitehat/
> We only pay individuals
edit: down-voters, please point out the faults in my logic.
> I never contacted Facebook or Alex using my work email account. It was only after Alex contacted my employer via email that I sent a reply from my work account. Alex indirectly contacted me at work, not the other way around.
Also worth noting that this is frequently done in the security industry - folks will often credit not only themselves but also the companies they work with and are associated with in a security report.