From the main chat integration docs (Discourse Chat Integration):
I think that documentation could use some clarification. It’s been a few years since I used the plugin. From reading the doc’s Security/Permissions section, it’s not immediately clear to me how the chat integration discourse username
setting affects the way that notifications are displayed on the chat provider.
Osman Gormus:
How does this integration affect the overall pageview quota?
It shouldn’t have an effect on the pageview quota. Discourse post data is sent to the chat provider via the API. When a message related to a Discourse post is read on the chat provider, it isn’t generating a page view on Discourse.