That’s them. Or one of their many unreliable partners who get serious commission for flogging that crap.
Here’s a rundown from The Safe Mac (who sadly have just been picked up by MalwareBytes): http://www.thesafemac.com/ongoing-mackeeper-fraud/ -- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To unsubscribe from this group and stop receiving emails from it, send an email to macvisionaries+unsubscr...@googlegroups.com. To post to this group, send email to macvisionaries@googlegroups.com. Visit this group at http://groups.google.com/group/macvisionaries. For more options, visit https://groups.google.com/d/optout.