I don’t understand your problem. Why don’t you keep both communities alive? It’s probably even interesting in the long term for each country to set up its own community to buy locally. If it’s really interesting, then make a crosspost in God’s name. This isn’t Reddit, where everything revolves around karma or user numbers. Free yourself from these standards. No user will be bothered if they subscribe to both communities.
Not exactly my favourite style, but thanks for the tip. 😅