That's likely a large party of why the NSA prioritized gaining access to their data through various programs, some of which have been exposed over the years. And when you're talking about nation states, even minor Hail Mary efforts have access to extensive resources sufficient to represent an entirely new sort of threat model to those companies. I doubt anyone at Google was worried about the risk of the NSA digging up their private fiber cables in the middle of nowhere with a backhoe to tap their internal communications prior to revelations about the program.