Coasters made at the expense of old pamphlet panels
As much as I'd like to say it's inventive and clever, however, I'm not happy to see somebody's idea for how to make homemade coasters was to cut apart pages from books that were meant for reading, not carving up. This is even worse than buying old pamphlets only for monetary value. If they're using color photocopies and scans, that's okay. But cutting apart old pamphlets is insulting to the intellect, and only compounds the notion some people only care about comics as spinoff merchandise, not as reading pastime material. If I've looked at the article's pictures correctly, whoever put those coasters together ruined some good pamphlets from yesteryear.
Making cup coasters with pictures of superheroes is fine. But it shouldn't come at the expense of the printed books.