I agree about the abuse, and the OP is probably a good example of that. Do you have any ideas on how to curtail abuse?

Ideas I often hear usually assume it is easy to discern AI content from human, which is wrong, especially at scale. Either that, or they involve some form of extreme censorship.

Microtransactions might work by making it expensive run bots while costing human users very little. I'm not sure this is practical either though, and has plenty of downsides as well.

I don't see this changing without a complete shift in our priorities on the level of politics and business. Enforcing Anti-trust legislation and dealing with Citizens United. Corporations don't have free speech. Free speech and other rights like these are limited to living, breathing humans.

Corporations operate by charters, granted by society to operate in a limited fashion, for the betterment of society. If that's not happening, corporations don't have a right to exist.