There are two kind of filters: cosmetic ("element hiding") and network filters.
Network filters = to prevent the fetching of remote resources.
Cosmetic filters = to prevent portion of the DOM to be visible.
Adblock won't load any content when filtered through network filters, the requests to the remote server won't even be made.
The problem the article refers to is related to how cosmetic filters are implemented in Adblock. And that problem has nothing to do with "placing overlays", whatever that means.
Network filters = to prevent the fetching of remote resources.
Cosmetic filters = to prevent portion of the DOM to be visible.
Adblock won't load any content when filtered through network filters, the requests to the remote server won't even be made.
The problem the article refers to is related to how cosmetic filters are implemented in Adblock. And that problem has nothing to do with "placing overlays", whatever that means.