It’s a group effort so if nobody in your country uses it then it’s going to be a lot less helpful to you.
I don’t know how it gets started in an area because presumably everyone else you know would get the same experience as you when they sign in so how does it encourage people to start building the knowledge base up?
I know that it works in the UK. My wife has used it and found a lot of useful info but had to add her own info too.