Earning potential depends on whether you want points or status. If everyone will be paying for their rooms individualy, you won't get any points. You'll only get them if the rooms are billed to a master account. You room block can still qualify as an "event" however, even if it's not master-billed. With qualifing events you will rack up elite status fastest in Priority Club, then Marriott or Hyatt. You'll need to check the T&C or speak to a sales manager to determine if an event that is not master-billed will count. It depends on the loyalty program and the individual property.