Note: if someone has, or knows someone who has, monetized a Twine game I'd be very interested in reading up on the specifics. Please include links for further reading!
Based on Google results, I haven't found anyone who is currently selling or has tried to sell a Twine game product. I did find a few instances of someone tried to hawk Twine itself as a product. Just to be clear, that's not at all what I'm referring to in this post!
So... I couldn't find any previous posts discussing monetization (which kinda shocked me), though it's great that Twine has such a big community of (should we call them freeware?) developers. But with Choice Script, Storium, Story Stylus, and quite a few other options out there (most if not all of which allow or push monetization), what's stopping someone from selling a Twine game, assuming that demand could be generated for said game?