I'm not sure what you read on Mouseavers, but you should understand that renting points isn't as simple as figuring out where you want to stay and assuming it will happen. In a nutshell, you have to find a DVC member who can and will make a reservation for you, then compensate the owner to use that reservation.
Especially when it comes to GV, it takes a lot of work and preplanning to make it work (and sometimes a bit of luck too.) Given the difficulties and extra point costs, renters usually end up getting multiple units, rather than trying to fit everyone in a GV.