1. I'm not suggesting people only use this interface. I myself do not. But it helps me make sure that I have greater coverage over at least the known sources of interesting stuff, with the rest getting the same random sampling as before.

2. This is just a prototype. There are other ways to filter stuff and I'm exploring those as well.

3. If and when Hacker News suffers a huge influx of new users, this tool will help me sift through them on my own schedule without causing me to lose my old 'friends' in the meantime.