It's well-established that the American IC, primarily NSA, collects a lot of metadata about internet traffic. There are some justifications for this and it's less bad in the age of ubiquitous TLS, but it generally sucks. However, legal protections against directly spying on the actual decrypted content of Americans are at least in theory stronger.
Snowden's leaks mentioned the NSA tapping inter-DC links of Google and Yahoo, so I doubt if they had to tap links that there's a ton of voluntary cooperation.
I'd also point out that trying to parse the unabridged prodigious output of the SlopGenerator9000 is a really hard task unless you also use LLMs to do it.