It was the NSA agent on duty at the time. You got the polite one or it was in a good mood.

There is also the problem of how the linking is done in most Rust projects. Rust projects tend compile dependencies statically. If you wanted to use a library that is LGPL, your own project would need to be LGPL as GPL and LGPL require to release the source if you use their libraries by linking statically (as far my understanding goes).