Question: Is it possible to disable the primary feed?
For example, if I only want to sell a course without this feed or any discussions at all? Is it possible to disable or toggle the main feed based on a tag in FluentCRM?
Hac Media You can disable the Actions Feed from the Menu so it won't be displayed however logged users (and All users if fCommunity is Public) can access the route /portal where the Feed actions are displayed anyway.
It would be good to redirect user to a custom embeded page inside fCommunity if the Feed is disabled.
Also it would be nice to allow only Admin/Manager to see the Feed and other users are redirected to page or a default Space - Admin could decide what role can access Feed and where to redirect other users.
Challenge with a routes/ /members /spaces is described here
As you bring the Feed subject now so it would be good to disable the Feed route too and allow only Admin to access it. In this case custom pages inside fCommunity would be helpful so we could redirect users there. It makes much more sense to redirect users to Custom Embede Pages like Welcome Guide/Starter Guide in this case but also to a default Public Space in case when the Feed is disabled.
BTW: The Actions Feed is scope based so users can see posts/comments only from Spaces they belong too. In Public fCommunity probably everybody can see posts from Public Spaces.