What are /r/SmartWallpaper's favorite Products & Services?

From 3.5 billion Reddit comments

I've done a little digging and it appears that the developer, /u/feedk, was refactoring the app as of 9 months ago, but has otherwise gone dark as far as reddit activity is concerned.

According to the Play store, the app was last updated on the 5th Sept, however it's unclear what that update did.

If the developer becomes more communicative in the future I'll buy the app, but in the mean time it's not in a condition I'm happy to spend money on. Fingers crossed.