New Scientist published a link to this site.
The games you play are geared to improving machine intelligence, including, specifically, improving search engines.
One which chiffers might like, is where you and a cyberspace partner each get a tune to listen to. You briefly describe the tune and then each say, separately, whether you are listening to the same or different tunes. It’s mostly obvious, but sometimes surprising.
The people who set up the site have given it some forms which give it the air of a contact site. There has been no contact, I’m glad to say, and no chat. Whew!