On top of that, the article says they've got settlement-free peering agreements with many top tier ISPs, which is almost a requirement for a bandwidth-intensive service like this. I'm sure it still costs them in the neighborhood of $500k/mo after all is said and done to run this backbone with all the equipment, space, power, telco fees, etc. It's rather impressive they pull this off with a staff of 32 according to TechCrunch.