I have two theories.. 1. Having arranged the New Jersey race for 2013, which is arguably in a bigger market, Austin is being dropped as a venue with less profit potential to clear space for other money makers (Russia, etc). 2. This event always depended on state and local government money. There were many of opponents of this event because the state of Texas had to dole out a lot of money to fund it. Perhaps they're having an upper hand now? There is some scarce but interesting info on the wikipedia article. I chucked when I read: "In June 2011, the Austin city council endorsed the United States Grand Prix, with a vote of 5-2. As a part of the endorsement, the sport will pay $15,000 in carbon offsets and $5 million to establish an on-site research project into environmentally-friendly technologies." Gotta love the politics of liberal city councils...