"This post follows a talk at the University of British Columbia, which can be recorded and can be viewed here. The slides for the talk, synched with the audio of the talk, is available on Slideshare. The original dataset for this article, alongside the graphs and the slides, can be found at Figshare.
...A ‘megajournal’ is widely understood to be an online-only open access journal, that covers a very broad subject area and selects content based only on scientific and methodological soundness (or some variation on that statement), with a business model which allows each article to cover its own costs. With these attributes, megajournals are not limited in their potential output and as such are able to grow commensurate with any growth in submissions."