runway08, I made that point (no further service) a while back, suggesting STN may not have wanted them.
I would find it hard to believe that Stansted did not make a good attempt to get this service after their statement about trying to attract long haul services.
As for booking a flight? Only for the short term and with some sort of flight cancellation or failed airline insurance policy but we have to remember the service has only been operating a week so we can't write them off yet. The airline has demonstrated that it can make good decisions by coming to Luton in the first place.