One way you could encourage that sort of thing you’re talking about is to use the CC-BY-SA 4.0 license. It basically lets others use/modify your work but they have to release it under the same license. You can still sell them as well.
For some examples see the work Wuggy has been doing.
dang, Wuggy's work is awesome! Thanks for the intro!
And thanks for the intro to that creative commons license. I'll update my itch pages with it. This deck being my very first publication, I didn't exactly make it very edit friendly (I'm living and learning 😅) but I'll keep it in mind with future projects
