This is supposed to be a list of the top "websites". A visit to tumblr.com or to flickr.com should not be counted for yahoo.com. I think the title of the article is probably not accurate.
Still really surprising for me. I would've thought Google search alone would easily outperform all of Yahoo. And then Google also has YouTube, GMail, Maps etc.
I think the comScore data may be biased; IIRC they rely on a toolbar that's installed along with crapware, and so it'll be biased toward users who are willing to put up with crapware.
Agreed. It felt more like a Buzzfeed article to be honest. It's not really clear or scientific about it. Firstly it talks about 'top websites' implying individual website rankings worldwide, and then ends up casually showing US rankings with loads of website brands lumped into whatever parent company owned them, ending up with everyone wondering what the hell Glam Media (now Mode Media) is and why it's US only brands. Which is fine, it's just poorly written.