Because it's a cool little app.
This cool app also helps you find farmers' markets in your area.
"Tempted by cool apps, users should see Apple's privacy issues as a wake-up call".
"But operators need to ensure their 'shops' are filled with the coolest apps."
Especially when the new cool app is not from an established company?
It's going to be a very cool app.
But the amount of people that actually buy the app will still depend on how "cool" or useful or unique the app is.
The 'dangerous' issue here is the same - port over a cool app from one platform to another, with a completely different usage senario.
"How do you get more developers to write cool apps?
Take a tour of the features and functions of the coolest app on the block.