The Open Access idea has been around for years. ACM has had all of those years to "create a sustainable model".<p>Science is a community. Publications are the means of communication in that community. Up-to-the-minute access is necessary in order to do relevant research.<p>As a retired researcher I struggle with spending $40 for a 4 page paper written by someone who was in my research group years ago. Given that I read a dozen or more papers a month I too struggle with "a sustainable model".<p>You want to be "in the middle" of the community communications and you want to make money doing it. I want to keep up with the community and do research. You are actively blocking that effort.