“In a previous blog (published December 2019) I explored the performance and changes of the MDPI journals, examining their growth up to the end of 2018. Since I wrote that blog, data for 2019 are now available – and they are more remarkable than before (Table 1). Submissions in 2018 were over 140,000. In 2019 they were just under 240,000. Over 64,000 papers were published in 2018; in 2019 over 100,000. Estimated gross revenues (see note below Table 1) have increased by nearly 60 million Swiss francs. A downloadable PDF of this blog and the source data are available at the end of the document….
In this blog I reflect on what these trends mean for the arguments of my last blog – specifically, does growth demonstrate signs of vanity publishing? I also reflect on the responses to the first open letter that I wrote to the MDPI. The headline findings are that I believe that the growth has continued at the same rate (if not greater) because the journals provide a service that increasing numbers of academics find useful. At the same time the experience of publishing with an working for these journals remains uneven….”