Tom,  
Thanks for the links.  I know GCU is looking into lots of different ways of advertising and they have been experimenting with some.  I know there are days my sales are better and I think one of those experiments may be going on on  those day.  I don't know.  However, I trust GCU will find the best method to advertise for the dollars they have available.  I am sure they will consider how to target the most people in the targeted group of shoppers for the least dollars.  I would suspect this is one of the ideas they are considering, as GCU seems pretty savvy.  
Kathy