For some reason, people online seem extremely angry towards attention grabbing titles that are also 100% accurate and descriptive of the article. If you don't go out of your way to pick the most drab title imaginable, you are an evil scammer robbing people of their precious internet bandwidth.
Even the author initially decided not to use "10% of the top million sites are dead" because it seemed "flashy, gimmicky, and potentially clickbait." Well yes, it is flashy, but it is certainly not clickbait. Why on earth do people hate on titles like that, when it accurately describes one of the central findings of the article.
I swear, one day someone is going to find a cure for cancer. They will publish something with the title "I have found a cure for cancer." And the first thing they will hear is some misanthrope complaining about their title being clickbait.