Dear wdmanuel,
Rest assured that we saw your question & we've been pondering the most
suitable answer. It turns out the answer is not terribly
straightforward. For example, even if a license had expired, I
wouldn't be able to share that information with you for reasons of
contractual confidentiality.
So here's an answer that is legally sanitized & sanctioned: "We have a
variety of sources of data for Maps, including user-contributed data,
licensed data, or a combination of the two. We continually evaluate
our sources of map data in order to provide a great exience for end
users, and may switch data in a country from time to time."
I hope that helps!
Cheers,
Jen.
P.S. YM T has also made a pertinent point :-)