Indicate the origin of featured apps

Over in Fedora-land, there's been some disquiet regarding the featured application banners. The crux of the issue, it seems to me, is that these banners appear to be presented by Software itself, and by implication the distro/OS vendor. They come across as being "our featured apps", even when the apps are coming from elsewhere.

The simplest solution to this that I can think of is to show a small source label which indicates where the app for each banner is being hosted. One challenge here might be having a nice label for each remote. If we end up with URLs it could be a bit yucky, but I don't want to go building abstraction layers for this (we've been down that path before).