Originally Posted by
mfkne
To be fair though, there are plenty of examples where shuttle trains such as this one, linking the airport to a public transportation stop (train station, tram stop, etc) are free of charge (as they really should be), so it's not terribly far-fetched to assume it's free.
Yes, and they don't seem to go out of their way to make the rules clear either once it's understood that
some passengers will require tickets - excerpt from website posted further up being exhibit A.