To be clear, this use case is only really valid if the "Blockchain" has finite units and can't be counterfeit, thus the payments for communication are actually valuable. This is the end of the free Internet and the beginning of the pay for use internet.
You'll likely have 2 choices:
1. Opt in to the walled garden with your government issued digital ID where every activity is tracked and stamped with your confirmed identity. This has all the obvious drawbacks of censorship, coercion, and a pervasive chilling effect on free speech when your entire life can be shut down with a click of a button. CBDC fears largely fall in this camp.
2. The system quoted above. All transactions will be stamped by a digital wallet transaction attached to a pseudonymous identity, not so different than the current internet. These identities can be abandoned as needed and can obviously be doxxed and run into similar issues as option 1, but obviously dramatically more freedom for those willing to work for it. Onus falls on individuals to protect their privacy.
Both options will likely exist at the same time and individuals will have to make a choice. Most will probably have a foot in both worlds. Internet use will no longer be free, but that's a good thing because the current model productized the users and that's the core cause of so many issues currently. Worth keeping in mind that the ones that are pushing AI and creating this spam problem are also likely the same that will benefit from the digital panopticon we're being pushed into.
Buy Bitcoin.