That setting isn’t for anonymous/non-logged in users, it’s connected to the ‘anonymous mode’ where logged in users can create temporary alternative accounts (enabled by adding groups to anonymous posting allowed groups)
There has been so much confusion between three features in Discourse: 1) anonymous mode (what we’re talking about here), 2) anonymous users (who are not logged in), and (3) anonymizing of users (which admins do instead of deleting users in order to retaining their contributions to discussions).
We have already identified this issue and are going to at least partially address it by renaming anonymous mode. At the same time we’ll review and improve the related settings.
Ok that clears a lot. And, as almost always, Discourse team has already identified the issue and work is on the way. But in the mean time,
Can’t this (i.e. what I’ve raised) be solved by simply replacing 2 words:
From: " engagement from the visitors, who are not currently signed in"
To: "engagement from signed-in users, signed in users who wish to remain ‘anonymous’