bhtooefr is a user on mastodon.social. You can follow them or interact with them if you have an account anywhere in the fediverse.
If you don't, you can sign up here.
The caveat of making free and open source software on Android is that if your application is good, there is someone who's going to take the code, change the branding, add advertisements to it and profit off of it. It happens literally everytime and Google is barely doing anything about this.
So yeah I understand why most Android devs are reluctant to release their code