There’s a good discussion of how to use Parchment in this thread. This is specifically for Inform 6, but the principles are the same for Inform 7. I also discovered that there’s some good topics on this in the Inform 7 documentation.
Me too. I have never charged for one of my games and probably never will, but there’s probably people out there that would like to charge.
Itch has this really nice model where you can charge a small amount for a game, but players don’t have to pay it if they don’t want to. It’s like a try-before-you-buy. I think this is a nice model for anyone that wants to use it.