But how are you determining every order has not been as a result of the forum? Do you ask them all when they phone up if they are a user of the forum? Or were a forum user before ordering?
Now adays they can judge it by how many people get free delivery.
 
	 
  
 
		 
 
		 
 
		 
 
		 
 
		

 
 
		 
 
		
 
 
		 
 
		