Sorry Joe, you don't know much about how airports and airlines work.
And I didn't say Glasgow would be the ONLY outbound market, just the largest one.
Look at Jet2, they were at EDI long before GLA, and their gig is outbound holidays. Fast forward a few years and look at the 2014 programme. Big numbers, though both airports feature.
This isn't an EDI diss, I'm just asking you to take off the blinkers. There's room for both.