A plan or scheme involving a lottery, contest, game, prize, or drawing shall not be used by a real estate broker or real estate salesperson for the sale or promotion of a sale of real estate. However, a game promotion as defined in and in compliance with section 372a of the Michigan penal code, 1931 PA 328, MCL 750.372a, may be used by a real estate broker or real estate salesperson for any purpose other than the direct promotion of a specific piece of real estate.