a) You’re not paying for code, you’re paying for access to the app… kinda. You can fork it and kill off the part which controls access making it free.

b) This isn’t an open source app, just like many of the applications out there. Complaining that it’s more open but not fully open is weird. Especially when it’s being made clear that as an individual user you can do whatever you want with it, as long as it’s not release a malicious version publicly.

c) Trademarking doesn’t prevent anything from the newpipe situation. Have you looked at app stores? They are full of fully trademarked names being used on unofficial apps. Because trademark means literally nothing on [insert appstore here].