@Grizzled
I am very well aware of those. While landing the wingtips will still be folded out, so you still cannot operate them at a V/E classified airfield. Whatever financial incentive there is, is for the airport. As as they can only charge based on the MTOW, they cannot pass on any savings to the airline. The only thing that it can help with for an airline is with gate allocation, e.g. not being forced to use a remote stand...