I would be valuable for shared decks, like the one you mentioned. As far as I can tell, the majority of Anki users are medical school students or language learners. Both groups benefit from shared decks. So I think it's a good idea to pursue.

My personal interest is more on conceptual knowledge, like math, cs, history or random blog posts and ideas. It's often the case that, on the same article, different people focus different things, so it would be hard to collect even a small number of reviews on a flashcard you want to study.