I was struck by this part:

"FEINSTEIN: [...] upstream collection [...] comprises about 10 percent of all collection that takes place under 702, and occurs when NSA obtains Internet communications, such as e-mails, from certain U.S. companies that operate the Internet [backbone]"

If vacuuming the internet backbone is only 10% of the data they collect, where the hell do they find enough data to fill the remaining 90%?

Phone calls/SMS? Banks/payments? Encryption they can't break, so they have to ask the endpoint, like Lavabit?