I am in this midst of creating software and the Piwik source code would be a save me hundreds of programming hours if I could use it as a module. The software I am producing would radically change the Piwick code with extensive add-ons and additional features. It will be analytic software, but not web analytic software.
I know the GPL license allows me to commercialize and sell it, but I believe I have to provide provide the source code to those who purchase it which I do not want to do. Is there anyway around this? I want my final software (built with the Piwik module included) to be proprietary and commercial.