Thanks Alan.
I'm done asking about the points, I don't think anyone else wants to share and/or maybe there is no rhyme or reason on point allocation.
Somwhere, a long time ago, I read the official rule on Instant Exchange. I can't recall if it was in the RCI T&Cs, on the RCI web site, or here on TUG when Madge was around.
I don't recall the exact wording but it was something like... less than 45 days to check-in, you can reserve any available week for the points required to reserve the smallest unit, in the lowest season, in the region.
I believe the regions were those defined in the drop-down boxes in the RCI web site, but I'm not certain. At any rate, that is where the point values come from. It was the lowest number of points required for a Studio unit, in the lowest season, in the region. It didn't really matter much (to me) whether it was 6500, 7500, or 9000, as they're all quite reasonable. (I think I've also seen weeks for 7000 pts.)
For the most part, the Instant Exchange inventory has evaporated, for reasons already explained. They should really just do away with Weeks vs. Points and just combine the two systems. They're both point systems now anyway.