At the most fundamental level, department stores are a distribution channel that facilitates the transaction of goods from supplier to the end customer. By providing a pleasant atmosphere, sufficient parking, convenient locations, security, etc. the customers' experience shopping is made a pleasant and enjoyable one.
Suppliers must pay for shelf space in department stores, with the "prime real estate" being the most expensive. (This is why items placed on the rack at the checkout are relatively expensive on a cost to value ratio, the premium will go to covering the shelf space cost)
It comes down to the contract between the Realtor and the brokerage plus any contracts that might be still in force between the clients (buyers and seller) and the brokerage. The personal relationship that exists between the Realtor and the clients is normally strong enough so that the clients follow the Realtor when they change shop. Assuming no existing contract for a current listing or buyer's broker agreement then there will be no ties back to the broker. The broker is free to market to the people and to otherwise compete for their future business. The Realtor has no direct hold on the clients. The Broker is entitled to retain any and all listings, at least until the listing expires.
The difference is the IRS designation and the intent. Non profits exist to serve a purpose. Business exists to make money, though they also may serve a purpose.
a nonprofit organization
monopoly
monopoly
Competition is another relationship that exists between organisms
What type of relationship exists between the crocodile and anaconda
competition
parasitism
they have intercourse
It is a symbiotic relationship.
commensalism
The cat is the predator and the mouse is the prey.
No particular relationship exists between the two for the simple reason that such relationship(if any exist) depends on the material one is concerned with.
The relationship between the clownfish and the sea anemone is mutualistic.
exponential
A relationship between variables