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The user could configure the browser/email-client/social-network to not accept messages that didn't submit a fee above some amount.
It would set a market price for human attention. The price would be public and known live to anyone.
Ad-tech co's get 100% of advertising revenue. Users get 0%. This would flip it around so users would get 80%-100% and ad-tech co's 0-20%.
It would make LLMs/AI spam prohibitively expensive.
Many of today's popular programming languages are free. Java, C#, Python, OCaml, C, Rust.
Why aren't there more non-free, paid, programming languages today?
Is this an arbitrage opportunity? What's the best way to harness this concentration of energy?