Now that subs are more widely support, perhaps a sub for that, ~free.

Where posts and comments are free. Not sure now a person could post "without requiring an account" , but it could be where a person could post something, get tipped, and then have funds to post (or re-post the same content) to ~bitcoin (or ~nostr, or any other ~sub).

It wouldn't even need to be a sub that appears in the list of subs, ... but something that a person would see when they go to post or comment and the error message offers that the post or comment can be added to the ~free sub instead.