That's a little unfair, it's a concept, not a public demo. There's apparently only a few people testing it so far. It might have been overlooked or just easier

That's a little unfair, it's a concept, not a public demo. There's apparently only a few people testing it so far. It might have been overlooked or just easier for some reason to inline the normal twitter timeline view, or whatever they call it, and there might not be a dedicated premium adfree view yet. Surely they'll reduce ads for the public when paid users en masse have access to this.