It’d be nice if there was an option to mark the new “Also published by” stories as read, either automatically as you scroll past them, or in bulk from the article pane inline with the section that renders the “Also published by” stories.
This is the default, but only for Premium Archive users. You can change the preference in the feed options popover, at the very bottom:
Are you premium archive? Because that shouldnt be an option for non-premium archive. It’s a premium archive feature, so I’m afraid I’m going to have to fix that.
Fear not, I am a premium archive subscriber