I don't think its that. I think it is literal to the effect of, twitter wouldn't have such a huge crowd to serve ads to without people like King who have tons of followers coming to the platform to get updates. An example, I don't have a twitter account, but I will surf Hector Martin's twitter for updates on Asahi Linux development. If it wasn't for Hector Martin's content, twitter would never be requested by my browser.

So it is essentially, charge the people who bring the users to twitter.