Hacker news and gatekeeping, a match made in heaven.

>out of the commons they're trying to exploit.

I feel that you may be suffering from a bit of insanity yourself. In the tragedy of the commons, the commons itself was being lessened by its usage. In this the commons still exists and is usable by everyone. You are free to take the same map and turn it into a minecraft map if you'd like. Someone just took a copy of the commons, modified it, and then offered it for sale. That sounds like the purpose of the shared commons to me.