I don't see the part where they "stole" it. They just didn't mention tweetknot by name. I'm not a TC fan at all, but I think you need to back up your accusations a little better.
Otherwise, it's just a lack of attribution which is pretty normal when writing stories.
TC wants a dramatic story. And the only way to make it credible is to hide what they are talking about. Once the site in question was revealed, their article became laughable.