Yes, they are a form of embedded networks but the most benign. There are protections under the law that allow individual owners the freedom to choose who their energy suppliers are. So if the “bulk bought” energy isn’t onsold at a competitive price, the consumers can go elsewhere, even in apartments.
The reality is that a good deal will see all the energy used in running the building be bought at a discount and consumers benefitting from reduced domestic charges too.
Some strata managers are even bundling different buildings together to get even greater reductions. For once, there are deals that aren’t too good to be true.