They're not advertising trackers. They're trackers to catch content-scraping scum and mess up their ability to scrape.
But still, allowing a third party to MITM-modify your html is utter madness. All sorts of things it could break.
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
But still, allowing a third party to MITM-modify your html is utter madness. All sorts of things it could break.