I bet VW won't sue anyone about this soon to not have new negative publicity. And I agree, this is clearly satire.
I think about things like a library for leader election, where there is a "Russian hacker" service that manipulates the election result or maybe a logging framework that accumulates logs and occassionally emails them to journalists.
Out of more than 600'000? A bunch, I bet.
(Yes, I was shocked at the number too)
It's also worth saying that even if they don't have a automated system to look for x-infringement, they have many employees who when bored could end up searching for (say) Volkswagen on github.
Whether they care or not is another matter...