Mark Thoma eloquently explains why he has not monetized his blogging:
As soon as I start trying to maximize monetary gains rather than maximizing education, it changes the posts — the incentives are not well aligned. I become shriller, I find myself tempted by things that will attract lots of eyeballs even if they aren’t as solid as they might be, and so on. It changes the posts in ways I don’t want them to change, so it’s best that I leave that temptation lying on the table (though I am far from perfect).
I’ve always liked Thoma because among mainstream economists, he demonstrates an unmatched degree of openness (oh, I don’t mind the occasional link either). Kudos to him for resisting the commodification of his work.