With all of the DVC rentals on Redweek with the $190 fee disclosed, I very definitely think there are a lot of people renting exchanges of all types, but this doesn't sound like an exchange. FSA fees are very high, and I doubt many owners who rent can even recover much over their costs on the weeks.
I have my oceanfront 1 bedroom for rent on RW, verified and protected. I haven't gotten a nibble, but the studios rented already for only $1,000 less than the one bedroom. I don't get it, personally, but I am grateful to have rented the studios. I wasn't planning to rent the one bedroom, but I couldn't get consecutive weeks, Sat-Sat. I was able to get a Sunday check-in for the second week, which leaves a gap of one day. How does one deal with that, except to get a hotel room, which we will do, if we don't get it rented. But geez, it's a one bedroom, oceanfront.