In reply to Chris Van Patten.

I thought a lot about putting it into Akismet, or VaultPress, but ultimately decided against it. These days Jetpack actually gets better distribution, and is a better place to put free functionality that we want available to as many people as possible. I'd like as many of the WordPresses in the world as possible to be protected. BruteProtect also can auto-update plugins and themes -- something like that just doesn't make sense for Akismet, which is best with its narrow focus on the commenting experience.