I heard back from the PLoS people. (Aside: they are WAY more helpful to random inquiries than any of the for-profit publishers). The best information on this

I heard back from the PLoS people. (Aside: they are WAY more helpful to random inquiries than any of the for-profit publishers). The best information on this can be found in their tax returns, which are available at http://www.plos.org/about/what-is-plos/progress-updates/ http://www.plos.org/about/what-is-plos/progress-updates/