I got curious as well, because the craziest party poor me can imagine would clock in at maybe half that, including travel. All I could find:

> The three-day festival in downtown Oakland featured performances by Jay-Z, Anderson .Paak, T-Pain, and Soulja Boy, and brought 8,000 employees from around the globe.

So that'd make it 8.5k per person. Building stages, paying permits, hiring acts like these, I bet that's where it mostly went.