It means Coca Cola can’t pay you to operate a Minecraft server where people scurry in the shadows of totemic Coke bottles.
The new rules will also prevent charities doing lots of different work within Minecraft, such as this amazing build promoting the issue of bee depopulation.
For example, the rules also forbid non-profits from promoting themselves through the game, which forbids museums from building parts of their exhibits within Minecraft.
Disclosure: I used to work with and am friends with two of Mojang’s writery folk, Owen Hill and Marsh Davies.