In 2023, Phillip W. Magness and Michael Makovi published their article “The Mainstreaming of Marx” in the Journal of Political Economy. I criticized that article in the previous issue of Econ Journal Watch, and Magness and Makovi replied, sticking to their guns. In both of Magness and Makovi’s pieces, the novel aspect of their argument is that Karl Marx was not well-known before the Russian Revolution. Nonetheless, as I reiterate in this rejoinder, their use of the synthetic control method (SCM) is inappropriate to this research question and, if anything, contradicts this claim. Furthermore, I present a simpler analysis of the Google Ngram Viewer data that is in line with Isaiah Berlin’s more conventional view of Marx already being well-known before 1917. I also show that Magness and Makovi have made basic errors when looking at the JSTOR data. My argument remains that non-quantitative methods are generally better suited to the study of intellectual history.