well tbh ever since regions and the farms built inside them were owned privately by individuals, blacraft was already capitalist. i'm just making the markets more efficient
UBSR's farms are owned by all of UBSR and everyone in UBSR can use them, and you have an infrastructure use treaty with UBSR?
According to this treaty, nobody can be entitled to the products of your infrastructure, because it allows people to use the infrastructure to gain the products. If you allow people to own the output of your infrastructure the Komrage-UBSR Infrastructure Treaty will need to be cancelled.
The same is true for Yqt's infrastructure, you cannot be a member of UBSR and let people own the output of your farms.
Trading items from your own public and collective storages in UBSR using the sheet should be possible but not shares in infrastructure. The regional governments can choose how to use the materials in their regional storages and may trade them, but the items they trade are still available for other members so that should not be a problem.
It could be possible for UBSR to have polls on buying shares in other states' private farms however
Solea seems to have no private chests as far as I remember