PLoS is free to access, but not free to publish, it's quite well established, and financially doing fine. There is no reason to assume they will just shut down

PLoS is free to access, but not free to publish, it's quite well established, and financially doing fine. There is no reason to assume they will just shut down any time sooner than the ancient paywall-powered publishing houses. And, believe it or not, the people behind PLoS actually care about open science, so it's not likely they will sell off either. Besides, it's not just PLoS , there's Frontiers (frontiersin.org) and many other open access publishers. In fact many paywall-journals allow authors to make their papers open access by paying an additional fee.