Is there a specific example? I'm having a hard time picturing a product page that only says "D&D sucks, but my game."

Marketing includes self-promotion on social media. I muted the person who prompted the first post in this thread but here’s the most on the nose example I could find in half a second of searching: “Want some cool dnd5e content that WotC doesn't profit off of? Check out the [🙃] Itch store!”