The bot should at least pick from a pool of apps new enough to run on the latest 2 versions of Android. There's a lot of ancient apps that haven't been updated in ages.
Could that same bot (or a different bot even) be relegated to doing 'best of' lists or 'featured' based on different metrics like 'most commented'? Just a thought
Imo random is good if you limit it to stuff compatible with Android 12 or newer, because there is a ton of legacy stuff that might have security or usability issues and any bugs would not be resolved
Because it is tedious and would only reveal a handful of apps. It would be nice to get a random app as once in a while it might be something you want to use.
This could also be a weekly engagement thing, but from the users? For example, a weekly thread called "This Week's Discovery". And then people can suggest their findings and share experiences.