is it related to http://www.cftc.gov/PressRoom/PressReleases/pr6423-12 and the subsequent collapse in volume http://www.ft.com/intl/cms/s/0/e0c9eea0-7ae4-11e2-915b-00144... ?
So while I could buy intrade as an unlicensed betting parlor I don't see them as a commodities trader. That said, folks don't like it when you make money that they think they should be making.
[1] http://www.cftc.gov/ConsumerProtection/EducationCenter/Futur... - "A commodity futures contract is an agreement to buy or sell a particular commodity at a future date"