I think that MarcK gives a typical illustration. The 'PE' or 'WT+' cabin has two kinds of clients:
- Those who's company will not pay for them to go in Biz.
- Those who can afford to pay personally for it but not for Biz.
So they have created a new level of revenue that was not being gathered - as all of them would have been in regular 'Y'. Brilliant move.