They may not care with a one time case such as the eBay poster but openly allowing it would kill the exchange business. On the surface you would think II would make the same money since an exchange fee is an exchange fee. But in reality there would be a run on valuable exchanges by people who will rent them out. This would cause all the masses that pay the annual fee to be left with only scraps. The better getaway deals would also dry up. II's revenue on annual fees would plummet.
I rent, so I tend to see this from a renters perspective, but I really dont understand this argument....There is already a run on good weeks. Most folks that want Orlando at Christmas, or Daytona for Bike Week, or New Orleans for Jazz Fest etc, etc. wont get them. and they dont show up in RCI anyway. There are only so many of these prime weeks, and it dosent make any difference whether or not somebody gets these weeks for themselves, or for their mother, or to rent...most of us wont get them..
For me the only things that I deposit to RCI is the stuff I dont use and cant rent..the very definition of scrap. and yet RCI seems to be doing ok