If I see a headline that interests me, I tend to copy-and-paste it to my browser's search box, and find the article that way.
Actually, more often than not, I've forgotten about "social reader", so click on the headline -- then, when they try to get me to give them access to my account, re-think whether I can be bothered searching for the article. About half the time, that stupid popup costs them at least one pair of eyes.
I agree with the giant text on the link: "Worst. Feature. Ever." It's just such a blatant, obnoxious attempt to manipulate your users.
