This may not be terribly important, but while searching with Google for some stuff, I had a few MSE links come up, and then the same things on another site: http://math.troplet.com/
It appears to be a copy of the questions and answers, but without any functionality (i.e., you cannot post or answer a question there). Their copyright page suggests they are a search engine for TV series, but the main page makes it look like they may actually just mirror the entire SE network, i.e., not just MSE.
Any idea what this is?