The top-5 or 10 are. Doesn't even matter where they finish: the organizer will still proclaim the winner as: _____.
They're entertainment, much like WWE wrestling, meant to showcase le Tour's winners and movers & shakers. And I'm sure everybody knows.
That said, the races themselves are still a good workout that you or I would struggle to complete.
(Knowledge taken from conversations with former pro who raced said post-tour crits against the likes of McEwen, et al.)