Same here too.
A game I released almost exactly a year ago had very few downloads. Over the last two months I have seen a slight increase in downloads, 1 or 2, maybe up to 5 per day, all from China.
All of a sudden in the last week I have seen 50, 80, and yesterday it peaked at 123 downloads.
I should also mention, this is a free game, with AdMob adverts. There is an occasional single unit of a USA download mixed in - but mostly ALL from China.
Either the people who download the game aren't actually playing it at all (not one single ad show in China) or AdMob just doesn't work in China ???
Not only that but the opt in analytics shows very little plays.
Either way - I've had about 500 downloads in the last week compared to ~300 in the entire previous year.
There is an IAP to upgrade the game and remove ads, needless to say, not one single user has paid.
A very strange situation. I wish I knew what was driving the Chinese downloads but I can't find anything pointing to my game ?!
Also iTunes Connect seems to say they are coming from store browsing ?!
curiouser and curiouser ...
I was also thinking of trying the 'make it paid' experiment.. but I am 99% sure that would immediately kill all downloads !
What is worse ? zero downloads of a paid app or hundreds of downloads of a free app that no one seems to actually play ?