William "Bill" Mensch exclusively designed the chip to Nintendo, and the interview of Bill Mensch leaves lots of question marks, but his motto was that both sides would benefit from the deals. Quote: "Ricoh supplied the Nintendo. It's the only exclusive agreement I ever gave anyone, exclusively for Ricoh to supply Nintendo 8/16-bit chips for their SuperNintendo. Well, my son got a Super Famicom."
Another quote: "And "I licensed Ricoh the camera and copier company of Japan. I gave Ricoh an exclusive license on the W65C816 processor for use in a Nintendo game system. That exclusivity meant the I would not license anyone else to manufacture a W65C816 for Nintendo, an exclusivity for only one company, Nintendo." As far I know, you could seize sales at least in the United States if there is a problem with deals like what Amiga Cd32 sales happened.
And little off the topic: "I licensed a company in Taiwan on my W65C816 design that has built probably about a billion game system chip over the years, many times what Apple and Atari combined ever sold. Those systems are still being sold to this day. I received royalties off every one sold."
So it is not a direct answer but I cannot find information that Ricoh did not honor their deal. He has made a statement in one interview that Jack Tramiel was ripping him off. That state would possibly indicate that he had better deals with others, or would at least mention if there was a problem with licensing associates.