IMVU

A 3D avatar software which works like an IM but is not exactly a game, and where you can't walk. They bill your (real or virtual) money for everything: virtual currency, changing your body and face shape and height, name ownership, name change, age verification, adult content, being able to block random attacks and submitting new products. They call themselves "The world's greatest 3D chat". The requirements for that, however, are far from adequate. You might find some very few intelligent people among it's users, but you can be sure that they either stop using the client software or leave the site overall.