> I assume others have recommended that you provide filters by media type?

What do you mean provide filters by media type? If you mean books or tv shows, that's already in place, though filters usually only show up when they make sense (i.e. you won't see 'filter by books, tv shows or anime' if your search only returned books.)

> However, even here on HN, you'd find that most people are consumers and not contributors

Yeah, I plan to add things like 'if you liked X, you'll like Y', etc. I fully support not making people sign up if they don't want to.