> I believe it's not possible to make a good recommendation system in general
It's definitely possible, however it would be limited to a subset of users (probably need 10 or 20 comments). When you limit it to submissions the number of words in a title is limited, and often not associated with the actual content itself.
I've currently set 20 to be the minimum number of submissions required. Lowering that limit would only result in random recommendations. Wouldn't it be hard for even a human to properly tell what someone might be interested in by looking at just 4-5 submissions they've made?
