Mafia Wars Loyalty Program

But we can have it randomly from the game as Emerald, Gold or Platinum member.. someone even mention there is a Diamond member! Let's say you are chosen as a Gold Member (even if you NEVER buy Reward Points on your account).. You can have benefits as a Gold Member.. not sure what the benefits are, but I don't want to discuss it furthermore..
Apparently there is a limit of time if you have chosen to become Gold member! Once you ignore the suggestion to add more Loyalty Points (in other words, you have to buy some amount of Reward Points), you will be downgraded to lower level ie Emerald member!What a funny feature..