How can you tell if someone blocked you on Xbox?

When someone blocks you on xbox one, it takes them off your xbox live friends list if they were previously added by you, and it will show up as them being “offline” permanently, their profile information will no longer be visible to you in any way, and they cannot receive your messages, invites or any other communication from you. This works the same way if you are the one blocking someone else on xbox.

Explanation:

answer; /// the above statement is (true);

so they can see what that city is producing and to also see if they can some how get that product. like gold in africa.