But if nobody is using it in the area you live in, those platforms don't help you. The fact that such software exists isn't what brings the value to users, it's the fact that other people use it that you want to interact with. The term for this phenomenon is "network effect", and Facebook just simply buys up tons of platforms that have network effects.
In my area, OfferUp has a significantly larger selection of items than Facebook Marketplace. If you mainly use Facebook Marketplace, it's worth looking at OfferUp, Letgo, or other local marketplaces to see if that's the case for your location.
