> We do not keep any information around like your name

But they might be sending a copy to the NSA, similarly to how Alphabet, Yahoo, Apple, Meta etc. have been doing (PRISM program, part of the Snowden revelation [1]). The US has the legal mechanisms of requiring this to happen, secretly, such as NSLs [2].

[1] : https://en.wikipedia.org/wiki/PRISM

[2] : https://en.wikipedia.org/wiki/National_security_letter