THese types of events are one off things (well two), but you get what I mean. It isn't every year we see F1 or the Superbowl in a location with timeshares. I would think there has to be other regular situations where it makes sense to rent and flip point bookings like this. Seems like a lot of work for little gain and a lot of risk.
You can check as much as you want. Take the points chart and x $.65, then look up the equivalent rent for the same week/view on Marriott.com. There will be a large difference. People will pay more for the points and less than direct, profit. Current Tbills are ~ 4%. You can easily make 20% ($.78 net) with effort - even more with prime weeks and views. I am sure there are people moving millions in reservations.
This is the exact same model as the DVC rentals. You can save money by booking points via a broker vs. direct from Disney. The broker keeps the difference. There are several viable businesses doing this, and back in the day some people even purchased 100,000 points to engage in the business. Think they have tightened up their rules over the last 20 years too.