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RF tracking was even more sophisticated in WWII.

The Gestapo developed a man-portable set worn under a trenchcoat:

https://www.cryptomuseum.com/df/gurtelpeiler/index.htm

I think the point here is that the satellites are not owned by the gov, but by a contractor, hence the quote about capital expense to operational expense. Everyone wants to be a service these days, you don't own it, you borrow it, etc...

I don't think the NRO puts much effort into finding illegal fishing, or other kinds of activity that don't impact US national security.

Having a capability and chosing what you use it for are different things. I also believe that the life of RF detection by third parties, and radio between parties has been entirely parallel. For every signal, there is a device hunting that signal in amongst the noise.

You probably mean the National Reconaissance Office [1]

[1] http://www.nro.gov/

Thanks, updated.