It might be neat if there was a top level domain that required no ads or paywalled content.

i.e. anyone can register a domain, but if an ad or paywall is found on a site there's a warning -> suspension -> domain unregistered. Only donation links accepted but they cannot provide extra content.

Hobbyist/amateur sites would thrive there as there would be attraction due to visitors being confident they won't be met with ads or paywalls.

It would be awesome until the registrar inevitably caves and gradually bends the rules to increase revenue.