I guess that only applies to paywalls that can also be bypassed by 12ft.io, right? I.e. paywalls that open themselves up for indexing by search engines like Bing or Google.

Yes, ideally you‘d want to have a few large communties on each instance and not all topics with a single userbase on one. This not only decreases the load but also prevents scenarios in which a single admin starts to capsule their instance with a large userbase away from the federation.

Sounds like a good solution. To make the colors less invasive it could only activate once two different users with the same name comment in a single thread.

Just until someone starts vomiting in places other than the toilet. In many cases it‘s better to be invited than to be the host ^^

Some of the posts or comments could include personal information. Wouldn’t Reddit be putting itself at risk of a lawsuit by leaving comments intact while executing a GDPR deletion request?