No. The individual who made the claim has a history of unsupported claims and exaggerations so I'm doubtful it's even true, to be hoinest. When pressed for evidence, he indicated that "he didn't want to post details because it might encourage spammers".
But true or false, I still don't see the average marketer or affiliate getting that kind nof attention.
I'm also still waiting to be convinced that even if you do manage to get people to join a Facebook group you'll ever see any marjeting or
SEO benefits from the effort.