Hi Jarrod. We have an 8-unit apartment building that has 4 furnished MTR units in it. We originally listed on apartments.com because of the other 4 unfurnished units, but decided to put the furnished units on there too since it didn't cost us anything extra. We've been surprised at that number of leads that have come in for our furnished units too. They do tend to be more locals, but not exclusively. We've had 2 units rented long-term at our MTR rate which seems like a homerun to us because we have no vacancy, cleanings, turns, etc. Those tenants haven't been any more problematic than tenants from any other platform. We've also had a number of people relocating to the area reach out and say that they would prefer a furnished unit while they looked for a more permanent housing solution (often purchasing a home).
We have a hospital nearby and some of the physicians work 7-on 7-off and live a few hours away. We've had some of them take units for longer periods and just stay there the 7 days that they're in town. They've been the best tenants because they are only there half the time and even then, they work all day and just sleep there. I've talked to the physicians about why they used apartments.com to find us and most of them have never heard of Furnished Finder because they aren't travelers and they didn't look at Airbnb because they thought it would be too expensive and they didn't want a different place each time they came.
If you can do it for no or low cost, might as well. Its always good to bring as many leads into the funnel as possible, and then just maintain your usual criteria when screening. We don't list who we are looking for on any platform though. I agree that is walking a very fine line with Fair Housing Laws. We make our application criteria clear and those that meet them are usually quality tenants. My other disclosure is that I don't use any of our platforms to do the screening. We have our own internal application that we use regardless of the platform that the lead comes from. Hope some of this helps and good luck!