[CodeCompost]

Now do Reddit next :-P

[malermeister]

You can just extract the API key from the official app and patch your third party app of choice to use it, at least on Android.

[flangola7]

What if the app is closed source

[malermeister]

Doesn't matter, you can patch binaries as well. Here's patches for Boost and Sync for example: https://revanced.app/patches?s=reddit