Not only that, but monetizable DAUs, which is basically an advertising metric consisting primarily of folks whose only actions on a given day might just be "che

Not only that, but monetizable DAUs, which is basically an advertising metric consisting primarily of folks whose only actions on a given day might just be "checking my feed, liking a couple posts", and from which fake users are likely already removed without there being a strong reason to shut down their accounts. Whatever ad impressions those users get don't get billed to advertisers, and there's no strong motive to shutting them down if they haven't published anything contravening Twitter's policies...