After several high surplus years, a relatively small 2016 deficit will not sink PLOS. However, the trend over the past five years does not look encouraging, and 2017 looks no better.
Phil Davis is a publishing consultant specializing in the statistical analysis of citation, readership, publication and survey data. He has a Ph.D. in science communication from Cornell University (2010), extensive experience as a science librarian (1995-2006) and was trained as a life scientist. https://phil-davis.org/