Memes

If I had to guess, I would speculate that their motivation is a long-term play to squash the general perception that Android has more malware (and is therefor less secure) than iPhone. Just about every article I've seen to that effect includes (1) enable unknown sources, and (2) install this malware app; so they probably see the current hurdles as insufficient and intend to perma-ban dev accounts that they find signing malware apps.