Did their "sales" double? or their users/downloads? The author likes to conflate downloads of their free app and their paid app. I went back and looked at the previous post - when their "numbers" doubled. Then they moved from 11 to 8 in the store, now they're at 13.
Now that Nike has a directly competing product at 1/3 the price I want to see the follow up post with revenue numbers after Nike's app has been in the store for more then a day.
I see no reason to believe their conversion rate would change. If it did that would be a nice disclosure, but why are you seemingly so offended by an optimistic entrepreneur? Is there any other way to win?
Now that Nike has a directly competing product at 1/3 the price I want to see the follow up post with revenue numbers after Nike's app has been in the store for more then a day.