Except, its Zaha himself, in reality that has mugged off both clubs. His wages will have at least doubled when he moved, so any £2m 'profit' that Palace will have 'made' in return for being without their star man for a year, will be going straight to Wilf, to spend on Lambos, and hanging out...
The £15m figure included a whole load of add-ons, that he hasn't come close to meeting, on account of him turning out to not be good enough.
Doubt they actually got £10m.