From Apple developer Equinux’s blog:

Apple now hides an app in the charts once you’ve installed it. Give it a try: Go install TV Pro Mediathek (VOD for German TV content) from the App Store (currently #3 Top Grossing in Germany) and then go back in to the App Store: boom – it’s gone from the charts and the next-placed app has moved up.

This tvOS top charts algorithm change even affects featured apps on the start page: TV Pro Mediathek no longer shows up in its featured slot on the start page of the German App Store once you’ve installed it.

John Vorhees wrote about this in this MacStories post:

We have confirmed that the same phenomenon occurs in the US Apple TV App Store using the AMC television network’s Apple TV app. If you download the AMC app, which is currently featured and ranked among the top free apps in the US, and then force quit the store by double clicking the Home button on the Siri Remote and swiping up on the App Store app, the next time you launch the App Store, AMC will no longer be on the Featured page or on the top free app chart.

This is an interesting experiment. Screen real estate is at a premium on the Apple TV App Store. By eliminating apps that a customer has already downloaded, Apple is able to present customers with more new apps. The change does mean, however, that the charts are not true top charts, but instead, top charts of apps someone hasn’t already downloaded.

I see the value here, both for you and for Apple. You get less clutter and more useful info in the charts and Apple gets more sales. But there’s some part of this that grates, just a bit, a sense that the top charts are not reflecting reality. Maybe we need an asterisk and a note that makes the situation a bit clearer.