I don't think it's official. If you click on the links on that page, you are directed to the official Jeopardy and WOF websites. I suspect that at one time there were quite a few ads on this website. Glad it's still hosted though. I love looking at these sites, brings back a lot of great memories.

For example, when my school first got internet access. It was on two computers in the library. Each class would get scheduled time to come and "surf". You would prepare for your upcoming slot by coming up with a list of urls. I remember wanting to go to the TSN website (Canadian ESPN basically). They would list it during shows and I remember having to watch for a while because I couldn't write it all down at once... http://www.tsn.ca I would get a few characters, then have to wait for the next splash of the url.

Ex. https://www.jeopardy.com/show-tickets/