"massive advertising campaign" this has been done as each airline tried MME. If you remember Baby and MME were every where for the first year of setting up and then operating from MME.
During the Airtours move to MME I heard of people in the Sunderland area who were booked from MME without knowing! When they complained were told only flight available from NE!! A travel agent tried the same with me during this time, when I pointed out the available flights from NCL I was told no seats available, I went to another agent who surprise surprise found seats on those flights!
So I think we can say most things have been tried!!