Published 2012-10-16T19:53:05Z Updated 2020-09-15T11:09:27Z
Upgrade to a Letterboxd Pro account to add your favorite services to this list—including any service and country pair listed on JustWatch—and to enable one-click filtering by all your favorites.
the phrasing "hidden" is debatable. stumbled upon most of these. some also don't have that many views on letterboxd, i guess.