When it comes to getting people to sign up for a website, developers have a multitude of tools available to refine their signup flows, like A/B testing and funnel analytics. But there's something that these tools often miss — when a user does finally convert, it's also helpful to know which ads, links, and splash pages didn't work for them the previous times they arrived at the site. Unfortunately, that's a bit harder to track. Now analytics service KissMetrics has an answer. Today the company is launching a new feature that will let site administrators hone in on individual users to see both their current usage history on the site, and their history before they actually signed up for an account.