I have what is likely a very simple question about making changes to a WordPress plugin. I apologize for the simplicity of my question, as I am very new to working with code that may be open-source and new to plugin development.
Am I allowed to remove the “Powered by WordPress” link in the footer?
To put it like this:
They say WordPress is GPL, and therefore all plugins and themes made with it are supposed to be GPL. Fine, but if I spent three months coding an extremely complex app theme with the intent on selling it repeatedly for profit, such as a medical office scheduling system theme, then how can I protect my investment, if even a moderate amount?