Elon Musk has stated that "If our twitter bid succeeds, we will defeat the spam bots or die trying! And authenticate all real humans": https://twitter.com/elonmusk/status/1517215736606957573

See more:
https://www.gq-magazine.co.uk/technology/article/elon-musk-twitter-changes-authenticate-humans

This market resolves YES if, by 2023, multiple prominent media outlets report that Twitter has visually distinguished accounts associated with authenticated humans. To resolve YES, this change must be released in a way that is expected to be widely published to all users, i.e. not just an experiment but a recognized feature for at least significant user groups (i.e. would resolve YES even if only available to paid accounts).