It's time to rethink twitter and launch another service.
Readers want to see the content they select, in the order they select, from people/posters they find interesting. Have conversations and maybe connect with people they follow.
Posters want to control their feed and who sees it, control the conversation a bit more, perhaps pay for better tools to curate replies, get rid of spam/trolls etc, have their complaints about stalking/nazis/trolls taken seriously by someone who cares.
Advertising is at the root of the problems of Twitter because advertisers are their only customer - they are forced by their bottom line to find ever more inventive ways to boost impressions (the overwhelming notifications, the dystopian 'home' view which shows you content selected by twitter, showing likes, plays for engagement/eyeballs rather than quality, and now this new 'interest-based network' idea which lets twitter select content). Facebook suffers from the same disease - they must own your feed and your attention, any user control hits their bottom line.
The solution is of course the radical option of removing advertising entirely.
Readers should always be free as they donate their time and attention.
Posters with thousands of followers (whether businesses or individuals) would happily pay for better tools to manage their readers, manage the feed, manage responses to posts etc. Some of them would pay quite a lot for more control/access.
Journalists, traders, businesses, developers would pay for access to a firehose of data and ways of working with that data (public data with user permission of course).
I'd pay to broadcast on a version of twitter without ads, nazis and trolls, wouldn't you?