It's pretty much in the article as many countries (not just those listed) massively incentivise quantity over quality of publications, and anyway quality is har

It's pretty much in the article as many countries (not just those listed) massively incentivise quantity over quality of publications, and anyway quality is hard to judge and the proxies used are relatively easy to game. A paper mill combined with plagiarism, a citation ring and a bit of deliberately overly complicated exposition (or just plain lack of writing skill) supports many a career in academia I'm afraid.