The possible subtext is that he is shutting it down in fear of bad repercussion - like being exposed for gaming the app store rankings - or to simply avoid such accusations.
Most people who get one don't know if they can talk about it publicly or not and just want it to go away.
" I'm not sure if that is due to genuine virality & copy cat ommentors, an army of keyword-fed reviewers, or an advanced spintax generator. "
"I still have no idea whether or not Flappy Bird gamed the system"
Not much of a smoking gun there.