There is a distinct possibility that those users arent visiting regularly. They visit via Google search, explore a bit, don't create an account. Next time they

There is a distinct possibility that those users arent visiting regularly. They visit via Google search, explore a bit, don't create an account. Next time they come in, it's again via Google search. Reddit may or may not be able to track them. And again, you cant see that they are even visiting a page. All the signals - upvotes, comments, etc. are only available when logged in. (except for video views)