They don't attract better yields - a point I raised in the paragraph above. But potentially they attract better loads, especially INV for transfer traffic, if you're just playing a simple bums on seats game. It would appear they are going for thin southern European routes that can be served by a single daily rotation, handled by cheap 3rd parties and abandoned overnight in the event of a major restructuring. (cf a 'proper' 2/3 times daily). If would seem C class is only being kept to screw more cash out of the high density routes, where you can gamble with the moving curtain and C class schedules to pick up the seriously expensive traffic. I'm guessing that operations such as MAD are stuck between these categories.

All this assumes that there is a plan at BD at all. They blamed the competition when Barcelona and Rome ended, which was odd for BD. When an airline that prides itself on taking on the big guys in commercial aviation and offering a niche product starts running away from competition then something has gone badly wrong. Even Bishop appears to have lost the energy for LHR fights these days - leaving it to Branson to spearhead the legal action over T5 fees.

Clearly BD is unlikely to be around in its current form for much longer. Enjoy what's left while it lasts...