Capitalism is reliant on a free market. That does not make it the same nor does that mean that a free market is reliant on capitalism. The concept described above is a free market, not capitalism.
Yes, the first part of my answer was rather limited to Bavaria, where Brezn can be part of a meal but not along with Kraut and where Butterbreze is the most popular variation if not part of a meal. Also some fresh cheese with herbs instead of butter is common. Afaik the other variations are more popular outside of Bavaria.
Brezn go well with Weißwurst and sweet mustard early in the day or together with Obazda, onions and radish as a brotzeit snack in the afternoon or evening, both together with a Weißbier. Other than that Brezn are more of a to-go-pastry, often as butterbreze.
And although brezn are available everywhere in germany, there are regional differences in how they are made and they are more popular in the south.
You're adding another person to the equation (the player that sells their game) and everyone is supposed to profit? Someone will make a loss compared to the status quo for this to work out and it's never the marketplace operator.
Hmm, kind of an open source Steam client that shares game files in a secure and verified peer to peer manner and only lets users play that have the corresponding NFT in their connected wallet. Now you'd only need an incentive for someone to develop something better and way more complex than Steam without making anything close to the same profit from it. Also you'd need a reason for publishers to sell their games this way, if after half a year they won't sell a single copy anymore, as there is always someone that offers their used license cheaper.
You don't simply alter facts, logical reasoning and scientific standards.