A virtual tour computer system for buying and selling real estate and real estate related services and products without violating anti-kickback laws is disclosed. It includes systems and methods for establishing ownership of the virtual tour computer system independent from real estate agents, related service, and/or product providers. It includes accepting payments by the real estate agents and the real estate related service or product providers to pay advertising fees directly to the system. It includes not tying advertising fees to lead generation. It includes allowing real estate agents to select preferred real estate service or product providers. It includes pooling the selected preferred real estate service or product providers to additional real estate service or product providers selected at random and randomly selecting real estate service or product providers from this pool to appear with a real estate advertisement.