Revolution Health, the company founded by former AOL Time Warner chairman Steve Case, has laid off its entire business-to-business unit, according to a tipster. In the rest of Revolution Health, there's little sign of its original mission — helping consumers lower healthcare costs. Instead, it's operating a series of vaguely health-related websites, and selling banner ads against them, a push for traffic for traffic's sake which began last year. But most recently, another source tells us, Revolution's pageview games have started to look desperate: