Seems more like he had the patent long enough to build a sustainable business from his own work, and now he’s been able to earn enough from it that others’ implementations aren’t a risk to him.
Which is kind of the entire point of patents, just that they last way too long relative to the speed of technological progress
He said "holding on to it any longer benefits nobody", implicitly including himself. He may believe that it's to his advantage for the patent to be more widely used.
Which makes sense--I don't doubt that he is a subject matter expert where this patent is concerned. If this algorithm continues to be widely used or its use increases, then that would be likely be good for him.