Google Analytics, Hotjar are measurement tools. CSE is google's custom search endpoint, stats.*.doubleclick.net is a doubleclick for publishers endpoint (Google's ad server) and doesn't mean much by itself, it doesn't automatically show ads from third parties or send your data to anyone.
The Facebook tags are sadly quite popular these days, I do agree those are not ideal but they are literally all over the net with like buttons, share buttons and "sign in with facebook"