Those are pageviews by logged in users, not by different logged in users. So if you, for example, navigated the site a lot, this could be all caused by you. I had more than 500 pageviews per day, all by me when I explored the settings of Discourse.
You can find more information at the Documentation topic: Understanding pageviews and the site traffic report
Crawlers are programs that index content on the web, for example for search engines.