You'll need to look at all the domains the page loads and see what they are.
The comments are blocked on mine too, and I took a quick look and saw requests go from one article to subdomains of:-
optimizely.com
googleapis.com
googletagservices.com
twitter.com
tiqcdn.com
typekit.net
addthis.net
That list may not be exhaustive, but if you use the debug tools of your browser (I happen to be using MS Edge for this, use the F12 dev tools -> Network, then open the page) you should be able to see what sites requests are going to and can work through them one by one.