Or you could just have a tag-like approach to news. If something new interests you, subscribe to a tag. If it ceases to interest you, unsubscribe from that tag

Or you could just have a tag-like approach to news. If something new interests you, subscribe to a tag. If it ceases to interest you, unsubscribe from that tag or snooze it for some months. You discover new tags by seeing them referenced in stories from tags you already follow. That's pretty similar to what Reddit does. And it doesn't even need much user data, other than the user expressing what they are interested in.