The lack of funding for traditional marketing is one of the greatest challenge for an indie developer. If they can come up with a (legal) way for getting attention, all the more power to them.
Why though, what does it add to the discussion? Why does it matter if a tiny indie developer gets a bit of exposure to his tiny little game? "It's just an ad" sounds needlessly cynical and dismissive.
This is fine for this guy, but not repeatable. When it's one guy its a fun story - a performance piece almost. When it's repeated, staged or even just fabricated then you have the beginnings of a new form of clickbait.