The clones continued to be sold and used when Steve Jobs took again the head of Apple and the change to the modern OS took place.
Those computers were very expensive at that time and the software running in those machines as well.
Power PCs made by Apple and their clones made by other manufacturers did not disappear magically in the air.
One still finds nowadays offers in the web of for instance Imacon scanners which were extremely expensive when new and are offered nowadays with the necessary old computer "free of charge" since newer machines cannot be used neither from the hardware nor from the software point of view.
Steve Jobs ended the clone program in 1997 and licenses only covered OS 7. OS 8 did not have any licensing deals with clone manufactures, nor did OS 9 or OS X...
Regardless of cloned hardware or hackintosh hardware being used outside of EULA, my original statement is valid and your statement is false. Apple has never licensed OS X and owns 100% of the OS X market share.
I would consult the many sources out there for further information on the facts I've detailed thus far.