Exclusion on components more fine-grained than page seems not to work in the context of a page. I.e. exclude /mysite/mypage/promos/0
from a given channel. Direct requests to that content correctly return 404 when the channel is matched. Requests to /mysite/mypage, on the contrary, will show the excluded node even if the channel is matched. The wrapping to filter components based on the current channel is done at {{ info.magnolia.rendering.renderer.AbstractRenderer#wrapWithChannelVisibilityWrapper()}}. It seems it has to do with inheritance because, i.e. it works on teasers area (not inheritable) components in STK's demo-project home page and not on promos area (inheritable) on the same page.