I think if they want to claim that they did this because they care about privacy it might be a little hypocritical to have trackers on the blog post where they're bragging about it.
It also looks like there are still several items on github.com that are beacons / stats tracking (and as such are blocked by privacy / ad blocking tools such as uBlock Origin):
The collector.githubapp.com is pretty transparent. It includes basic information like the current page, user agent, referrer, and time zone. All of this could be done via server logs, so it's not like it's that creepy like fingerprinting.
