I say this because back when I used to frequent Marginal Revolution, I found that there was a good deal of self-promotion of Cowen's work in the website - for example, he would link an interesting news story and provide minimal commentary, but then would link his tangentially related research. I understand his incentive for doing this, but the amount of self-promotion was enough to annoy me and make me stop reading.
Years later, I attended a presentation that Cowen gave that was ostensibly on his book the Great Stagnation, but in reality it turned out to be a demonstration of some online learning venture he was bankrolling at the time.
He's a smart and productive guy, no doubt, but my (anecdotal) experiences make me wonder about what is behind an article like this.