Re: Getting people to read is difficult too
I think that the article was pointing out that most people share these social media posts without stopping to think whether they're fake or not. When they're prompted to consider whether a random headline or post is fake or not, they begin thinking before sharing other posts.
I don't think this solution is designed to completely remove fake news, or to not be gamed at all. I think it's more designed to help modify people's behaviour by giving them a gentle nudge.
You can't drag a horse anywhere, but you can gently steer it.