A while ago, after reading about how much excessive tracking of users is done on the web, I decided that I was not going to track users of Reeborg's World. I had initially tracked users with piwik, found that some minor spikes occurred when I posted about it (I even found out that one person had copied the entire site) but the information that I got did not seem to be worth getting.
So, I stopped tracking, and mentioned on the site and elsewhere that I was not tracking users ... and have no idea how much it is used (it's free to use and does not require any login), and if the various changes I made to the site which are intended to be improvements are seen as such by the silent users.
A few people have contacted me with suggestions for improvements and with mentions of how useful the tutorial and the programming environment were in helping to learn Python. I am very grateful to those that contacted me. Still, I am curious about how much the site is used.
So, I am going to start tracking users and thought I should mention it in the interest of openness. After reading about various options, I am thinking of using Clicky instead of Piwik ... but I am curious to find out if anyone has better suggestions.