Agree. Wyndham will slow this down by not allowing discounts and by not giving upgrades on resale points. But, what is to prevent a mega-renter from taking all 4br's at a resort with their resale points and then booking a bunch of smaller units using the Developer points so that they can grab upgrades when the 4br's get cancelled? I only see 2 options, blacking out resorts during high demand weeks/weekends, or dramatically scaling back on the number of GC's an owner can use and/or purchase.
These mega renters are savvy, they will find a way to earn an income from their points unless Wyndham clamps down, HARD, on either the actual owner running the commercial business or by making changes that hurt those who like to use GC's for family/friends (not as a business).