Interesting initiative and the description in the README is promising. However, I think the developer is messing with the license. A cursory look tells me he wants to preserve original AntennaPod's GPLv3 license while licensing his modifications and additions as MIT, which is incongruent. I am not a lawyer but as far as I can tell, once a piece of code is GPLv3, all its next iterations must respect such license to the letter, that is, keep it under GPLv3.
Installed it and in the settings you can see the following message at the bottom of the settings.
Anyone willing to open an issue in both Antenna's and Podcini's repositories? I am mobile, can't at the moment.
Thanks for sharing!
Edit: created a quick issue in the repository, feel free to chime in, follow along.