This came up last year, I think it turned out he's talking about his profit points in the 1997 release of Jedi, which I believe is different from residuals? (Do we even know how much money Jedi '97 actually cost to do? Besides the restoration and marketing, there was that shitty musical number and I doubt John Williams wrote that new doctor's office music for free. And it ultimately made a lot less than Star Wars.)

It does add fuel to the idea that the special editions are legally considered a totally different movie and were only done to give Lucas more control over them from then on.