The number two paid app on iOS is based on a $10 GameSalad template
gamasutra.com
gamasutra.com
It seems like the black-hattery is pretty straightforward -- brute force.
http://1.bp.blogspot.com/-xDwdTYUzkHk/UASnQJj-cuI/AAAAAAAADm...
Assuming a 10% review rate, this game probably has 400 legitimate downloads - $400 revenue. Not bad.
Also the first review in both the US and UK stores says "better than flappy birds". (Note the plural)