Cazza - you are technically correct but it is marketing madness. The whole idea of Jet2 suggests Jet2 Malaga, Jet2 Amsterdam etc on the departures board.
Why the hell do I want to Jet to dot com? For most of us, websites are there to give us information, they are not a destination in their own right.
Of course, if DART group had set up Air 'Facebook', then it might be a different story