MidlandDeltic;
while you are right in saying that Go were not exactly low cost, the reference to what happened to them when they entered Scotland Dublin is not especially proof of anything. It would have been no different for Easyjet or any other airline for that matter, had they started flying the route.
I disagree strongly that Ryanair made a profit on Dublin Scotland route in competition with Go. Most seats on DUB EDI were priced as low as £5, I remember booking on a Thursday to fly the next day at £5, most morning and evening flights were packed with day trippers paying next to nothing to fly. Outside of first and last flights of the day in each direction, the loads were poor enough. There were now 7/8 extra 737s in each direction compared to prior to Go when it was only EI on the route with 2/3 F50s per day.... So there was massive over capacity. Ryanair lost buckets of cash and albeit lost alot less than Go did. However, Ryanair saw this as a major investment in terms of making a statement to intending entrants to their patch especially in Ireland.
EI-BUD