I tend to buy hardcovers but sometimes it’s not possible. I agree it’s a sure-fire way to avoid print-on-demand.
Like I say in the article, I don’t mind about print-on-demand as such - it’s the fact that these books are not particularly rare, they often come with bad defects, and they are pretty pricey.
it would be nice if they told you that's what it was before you purchase it, that I agree with. I think they do it this way because if it takes too long to ship it, you might not buy it, plus with one purchase, there is usually more. I may have gotten one of those books, but I wouldn't know since I'm one of those people that doesn't care all that much for paperpack, all the books I value I try to get them in hard-cover.