Sorry for the confusion! "Exclusive content" is the standard name of the section that we use to distribute community copies of the game (which are free, so the price doesn't appear). If I was charging extra for something the price would be visible!
I still feel like I'm not understanding something, then.
It literally says "Support this zine at or above a special price point to receive something exclusive." (emphasis mine)
That reads to me like it's saying "Pay a bit more and get something cool that isn't normally available."
This text is not mine and I can't edit it. It's the standard text for the reward section of itch, which was made to distribute exclusive stuff, but we use to distribute free community copies.