I did that — picked a booking, it redirected me to Expedia and showed a $0 rental! But then when I changed my region on the top bar from US to "Rest of Europe", that booking no longer worked. When I then search (on Expedia) for the same location and dates, I get very believable prices (200-300 EUR). When I change the region back to the US and search again directly on Expedia, I see the same scam $0 offer as previously.

I think this supports precisely my point — in EU all the fees are presented such that you can get the service without any hidden costs