Even if your tracking isn't directly harmful (I make no claims if it is or not), it's still indirectly harmful because it's training users to ignore warning pop-ups.
* If we had a bad website, people would complain that it's ineffective, and not helping drive people towards FOSS
* If we then add open source analytics tools to try to improve the site, people ask why we are "tracking" them
* If we then add a banner, people complain that we're training people to ignore banners
...so it's hard to get anything right, it seems! We could remove Piwik completely (although it's not my call - I'm just one person in the project). But then it'd be much harder to improve our website. Piwik is really useful and if we want FOSS to be more widespread and adopted, we shouldn't shy away from such tools, IMO.
> You're are assuming that not using tracking will automatically result in a bad website.
But that's not what I said at all. Please don't just thrown in things like that. I said that analytics tools can be really useful in many ways to help to improve a website (especially a bad one).
You ask "why", well look here at the features that the open source tool we use provides: https://matomo.org/features/
I'm not sure if you've worked in website design before but many of those features are very important and effective for improving a website. If we want to spread the word about FOSS, and encourage more people to use it, shouldn't we try to make the best website we can? While also informing users about the open source tools we use, and having a clear privacy policy about them?
You've clearly never done any work (either development or UX) for a website. If you don't know how your users are using your product, there's no way for you improve it. If the people working on the website want real usability data, then tracking is the best way to get it. Focus groups and forced testing can only give you so much information and it's not exactly easy to get a group of people that includes active users of your site.
I know you didn't intend it this way but your response smacks of complete ignorance.
* If we had a bad website, people would complain that it's ineffective, and not helping drive people towards FOSS
* If we then add open source analytics tools to try to improve the site, people ask why we are "tracking" them
* If we then add a banner, people complain that we're training people to ignore banners
...so it's hard to get anything right, it seems! We could remove Piwik completely (although it's not my call - I'm just one person in the project). But then it'd be much harder to improve our website. Piwik is really useful and if we want FOSS to be more widespread and adopted, we shouldn't shy away from such tools, IMO.