Being featured on the App Store's What's Hot - Who decides?

Apple is full of mysteries. The App Store is full of mysteries for developers.  This is why I'm still puzzled with Apple's choices of apps that are featured in general but in particular in the What's hot category. Take for example one of my application, Ultimate Password Manager. This app is consistently featured in What's Hot in Productivity in a few countries.

As of this writing, it was featured in Canada, France and Slovakia. Some day, only Canada will get it. some day it could be France. Never been featured in UK or in the US. Why is that? I mean, Slovakia? I never sold a single copy of my apps in this country. Is this choice related to traffic on the application's App Store page? Is it related to user reviews? I don't know. 

As the following chart shows, more than 50% of revenue in the last 60 days comes from the US. 

Why not feature my app in the US productivity's category too? This is where the action is happening. Maybe Apple want to "expand" sales of my apps to other countries but what if Apple would emphasize exposure it in the US, sales would certainly increase a lot. Apple, are you listening? To other iOS devs, what is your experience in that regard? Is there a way to get in touch with Apple on this subject? Any hint will be greatly appreciated.