what exactly constitutes 'noise' in a social network? if you're talking about the issue of having lots of stuff in your feed from people who you are not interested in, there is an easy solution: unfollow or unsubscribe from them! if your concern is more about having specific posts surfaced from people, but not all of them ("I'm interested in Bob's tech posts, but not his cat posts") then this has nothing to do with paid vs free and is a filtering/algorithm problem.