As far as I know that Piwik use GPL licence, I have to public my source code if I use Piwik. I still got some confusion about that.
I want to develop a plugin which access the even tracking of Piwik and display the statistics in my own way. The plugin will be part of my commercial website. Do I have to publish the plugin’s source code if I distribute the website?
Lastly, if I use Piwik API integrate in my code to tracking and monitoring web site, I don’t build on Piwik, it’s just used as admin tools to monitoring. Do I need publish my source code of web site?