You should reword your question as it makes it look like you don't think they deserve to be paid for their work.  Which is BS, because from what I've seen of KatherineOfSky playing and what I've played through myself, I can definitively state that they deserve to be paid for this game.  As a hobbyist developer (would love to get paid myself, but its really hard to finish something you're working on your own), I can attest to the work put into even the prototype, and you're lucky that was free.