It doesn't really solve the issue of restricting access to the contents though, you just need the one person to pay stream the whole blob and then republish it for free.

My opinion is I would not even try to restrict access, rather make the content very cheap and restrict at client level.

So cheap that a user wouldn't even think twice to stream some sats for access.

If it's cheap and easy the creator will make revenue on the numbers, most people will not mind paying.