USENIX has been open access for years. Some ACM conferences and journals (e.g. SIGCOMM/CCR) have been open access for several years. One step that ACM could ta

USENIX has been open access for years. Some ACM conferences and journals (e.g. SIGCOMM/CCR) have been open access for several years. One step that ACM could take that wouldn't require any technical changes to their existing infrastructure would be to officially offer republication and redistribution rights to any non-commercial digital library including arxiv.org, archive.org, sci-hub, etc..