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.

That'd be neat. I feel like that could definitely add to the community growth and engagement.

If I saw an app that I used regularly I'd definitely be willing to enthuse about it and talk about issues I've encountered.

Random isn't good.

A weekly post asking about the users fav apps or fav new apps. Or updates of apps and what's new in them.

Why not a human doing it?

Be the change you want to see in the world

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.

Here is a list of apps (taken from the names of metadata/*.yml files on the f-droid gitlab): apps.txt (pastebin)

Choose one at random:

#!/usr/bin/env python
import random
names = open("apps.txt").readlines()
print("https://f-droid.org/en/packages/"+random.choice(names)[:-1]+"/")

Maybe semi automated

Random chooses an all, the human rejects the candidates until something that is generally useful is found

I don't think many would be interested in https://f-droid.org/packages/org.hwyl.sexytopo/ for example

Or a icon pack like https://f-droid.org/packages/org.xphnx.ameixamonochrome/

Honestly, great idea.