This already was proven to be false by Apple itself.According to the article, the game has sold more than the alledged 3% addoptance rate(though no especifics were given).
http://appleinsider.com/articles/17/01/03/super-mario-run-app-store-purchases-exceed-reported-3-guesstimate-apple-says
My (locked) thread about how difficulty should be a decision for the developers, not the gamers.
https://gamrconnect.vgchartz.com/thread.php?id=241866&page=1







