The supposed upside of Marketplace is the lack of anonymity.
This is also the downside of Facebook Marketplace from the side of the landlord. I LIKE the other places for the anonymity it gives me. I helped a friend rent their suite 6 months ago and only used Craigslist and Used Victoria. I asked the folks inquiring to tell me about themselves. Only replied to those that fit what we were looking for. I have an e-mail address that I use just for things like that, that doesn't identify me.
Lots of folks don't use Facebook.