I suspect the option of the three options you listed which wasn’t one of the two they rejected as flabbergasting, was the right one. I.e. they were suggesting

I suspect the option of the three options you listed which wasn’t one of the two they rejected as flabbergasting, was the right one. I.e. they were suggesting that brewdog, uh, deliberately invites criticism, and then uses that criticism to their advantage by using defamation law.