The PEER project modeled the impact of green open access on STM publishers over 3 years with 53,000 peer-reviewed articles deposited in repositories and publisher websites. It found that repositories and publisher sites can coexist for green OA but repositories are not key for information delivery. The project infrastructure developed to support this, PEER Depot and Observatory, can now also support gold OA. Implications for RepNet include developing processes to support both green and gold OA models through building on the work done by PEER and developing a gold OA funding infrastructure.