The website workercenters.com explains: Leading worker centers are heavily supported by labor unions. Some have unionization of workforces as explicit goals. Labor unions enjoy the benefit of outsourcing their organization work to worker centers: Worker centers can engage in “organizational pickets” — protests to get a union recognized — of indefinite length, while labor organizations are restricted to 30-day pickets unless a petition for representation is filed.
Worker centers have proven an effective tool for union organizers enabling them to skirt labor laws. The activity of Community to Community and the support from organized labor it received in the Sakuma activities puts it in this category.