The idea behind NextDoor is that you are invited via snail-mail so you have verified neighbors. You need a "seed" person in a neighborhood to sign up and then s

The idea behind NextDoor is that you are invited via snail-mail so you have verified neighbors. You need a "seed" person in a neighborhood to sign up and then sign up some neighbors. It's real power is in community neighborhoods (gated communities, condo/townhome complexes). I found it to be a great tool to find out what's going on with the neighbors and a far more trustable marketplace than Craigslist for buying/selling items. However, if your living area isn't as "community-oriented", getting any sort of traction can be difficult. As it's entirely crowdsourced, if it's not in an area, it's because nobody's signed up to be a "seed" and invited neighbors, as opposed to NextDoor themselves not providing infrastructure/data.