No one pays $60/mbit for bulk internet transit. Low cost carriers (the cogent and like) can be had at $10/mbit with decent commit rates, even less if theyre purchasing gigs/month.
If Google is leasing dark fiber, there are still monthly reoccurring fees. I wonder if Google could afford to buy out an ISP such as cogent .just food for thought (I have zero financial information to back any of this up)