Devils advocat.
The parallel is not 100% but sometimes a case could be made for extending the limited series. Cars for example. Both the 959 and the Enzo have been made in series that were larger than what was originally intended and promised to the first buyers. The respective manufacturers made the additional cars because the prices on the secondary market became so grossly inflated and too many of their buyers were not "real" enthusiasts but merely speculative buyers wanting to make a quick buck.
Nevertheles I think that IWC was 100% correct in refusing this unusual demand.
JCB