I kind of like #MDPI for demonstrating how easy it is to make a ton of money by exploiting the flawed system of tying scientific publishing to scientists' performance evaluations.

Figure taken from "Public funds being swallowed up by scientific journals with dubious articles": https://english.elpais.com/science-tech/2023-10-31/public-funds-being-swallowed-up-by-scientific-journals-with-dubious-articles.html