Ask HN: Why doesn't Y Combinator have a separate link for teams?

Granted there are sites to find a co-founder but why doesn't YCombinator have a link like "TeamUp" where people post what they're ideas are, what they can do etc. It'll be helpful in forming a team, especially if you know that they're already a YCombinator Junkie so there's already some sort of a connection.

There are other entrepreneur networks but it seems like everyone is scattered among the networks.