Well, I would say that your #1 reason is quite untrue. I can't speak for everyone, but I rarely browse Reddit on a computer. The only reason to do so is because I want to write a long response. Normally I'm browsing from an app so I can lay on the couch and watch TV while I'm doing it.

#2 could be true, but it might not be.

Regarding the apps, I paid for BaconReader on Android over 6 years ago and still use it. It works fine for me. I have no desire to switch to the official app.