Just sticking this comment here since I think most people would like to see how the site works. People are interpreting the numbers incorrectly, as I also did at first even though it says at the top exactly how they're measuring these numbers.
Your entropy is determined exclusively based upon the people that have used the site in the past 45 days. For now that number is about 204k. So for instance if you see something has an etropy of 9.08 (as my user agent does) you'd also see that it says 1 in 542.15 browsers have this value. 2^9.08 ~= 542.15. The ~ there only because the thousandths and onward digits are not showing. My exact entropy would be about 9.08254825596. All that means is that of the ~204k people that have used the site in the past 45 days, 377 had the same user agent.
The problem with this is that the people using this site are going to be a heavily biased sample. And so by tuning to reduce your entropy, you are not actually reducing your trackability but instead making yourself look more like the subset of people that are actively using this site. And this becomes an even bigger problem since I do imagine this site is actively shared on more technically orientated sites, such as this one. But the settings of technically orientated users are often going to vary somewhat significantly from the settings of the other 99% of users.
The point of this is that by working to reduce your entropy on this site you may, ironically, end up making yourself more trackable. So the numbers should be taken not as a measurement of trackability, but rather as an interesting insight of your browser/setting differences/similarities of other users with the site.
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Also, 100% agreed on the silliness of them marking you down for not allowing cookies marked Do Not Track friendly. Until such things are enforced, in code and ubiquitously, they're meaningless unenforceable promises that rely on tracking and advertising corporations never lying.