Obviously, there are two different approaches to whether an owner can exchange through II for a week and then either rent that exchanged week or exchange it with a third party for another week.
There are numerous reports of people doing that with no repercussions. However, there have also been reports here at TUG (for both II and RCI) of people having their exchange company accounts suspended and losing deposited weeks for trying to or actually renting weeks in violation of the written rules.
I think it's noteworthy that there is nothing in print anywhere from II saying that it's okay to ignore II's rules.
The risk of getting caught and having something bad happen is small. However, for me, I'm not willing to risk renting (or trading) an exchanged week to a third person, risk that that person mentions at check-in or in a call to II to confirm the week that he/she was lucky to get this rental and have bad things happen. The worst possible scenario is where that renter spends a fortune on plane tickets to get to (for example) Hawaii, goes to check in and is denied occupancy. My legal obligation at that point would be huge, since I was the one that broke the rules. Is that possible? Yes. We have proof that both RCI and II monitor to some extent various rental boards, including TUG's.
Do you doubt that the exchange companies clamp down? There are a number of threads on this issue, but since we are discussing II, I'll offer
this thread as evidence that the possibility of adverse action being taken by II is very real. Also, here's
another example of a statement from II, posted by a long-time TUGger regarding a discussion with an II supervisor, not a frontline rep that might well be undertrained.
Bottom line? Do what feels right to you, but if you choose to ignore the written rules, you have some risk.