The Affordable Care Act's nonprofit co-op health plans, which see themselves as the rebel alliance battling established insurers, have signed close to 300,000 members and are set to expand into three new states next year, officials say. Starting from zero in October, New York's Health Republic Insurance has enrolled more than 50,000 policyholders, said John Morrison, who just stepped down as founding president of the National Alliance of State Health CO-OPs. That's among the best results so far for 23 nonprofits created by the health law. CoOportunity Health in Iowa and Nebraska has also signed up more than 50,000; Colorado HealthOP, close to 9,000.