I don't think it's too good to be true. They have over 2Tbps of unused inbound capacity (or at least they did in 2013, and probably more now), and their routers

I don't think it's too good to be true. They have over 2Tbps of unused inbound capacity (or at least they did in 2013, and probably more now), and their routers mitigate attacks at the boundary of their network.