And that's before you have to try and actually write for grant funding, perform any actual substantial research (that took more than 1.5 days), serve as an editor or reviewer to do any of that "peer reviewed" part, go to a conference on your subject, deal with students, teach, or really anything else with academia.
Writing for grant funding alone has already been a big complaint about how long and difficult it can be with limited success rates in a lot of fields. Time constraints of being a reviewer and how much of your own academic time you have to give up has been a major complaint. They're all time consuming. And then a paper / 1.5 days.
Really, from having been in academia for a little while, putting out something well thought out once a month seems rather fast.
Edit: It would interesting as follow-on research to look at the specifics of suspicious cases. What kinds of methods are being used to "game the system." What kinds of exploits are being employed? Are there common patterns among the suspicious crowd?
Why publish 1x when you can publish the same 10x? Copy and paste data from other people's work? "Lorem ipsum" papers that nobody reads? Extensive citation circles where they all cite each other 50x? Graphs / tables that just look like gibberish data? Very obvious LLM use that has many of the common hallmarks and speaking patterns?