It's clickbait in what I believe is the original sense -- the title could easily state what specific thing it is talking about (sulfur), but instead it uses a v

It's clickbait in what I believe is the original sense -- the title could easily state what specific thing it is talking about (sulfur), but instead it uses a vaguer term ("a surprise") so that you have to click on it to learn what the story is. Calling it "clickbait" here doesn't mean it's a worthless article. It just means that the title is vague in an obviously needless way.