I'd guess more and more valuable discussion will just shift to gated invite only groups. Private discord servers, signal, telegram etc etc I don't see another feasible way of protecting against the spam.
What's more strange to me is why these content places like Twitter and Reddit don't see this as a danger to themselves? Why would someone want to advertise in a place that's 90% bots? Reddit for example made it harder to check astroturf bots by blocking viewing comment and post history and giving every user default AdjectiveNounNumber style names. I get why it works short term but I've completely stopped using it because I just found myself facing fake botted engagement everywhere.
This has also perplexed me (advertising-to-bot-relationship), but I'm guessing the cost of combating these bots is going up (as complexity goes up and token cost goes down - whether subsidized or not).
I hate the idea that the future is only gated invite-only groups though. At the very least, some tag of "BOT" and then the ability to hide all bot content (unless it's highly upvoted by humans) would be great.