Only foreigners follow back?(Worth it to grow account?)

When I find an account that has all Americans/Canda/UK, etc…

Only about 4/100 follow back, maybe less sometimes.

However, when I follow everyone from big account, which are mostly Middle eastern/Asian, I get like 30 out of 100 followed back, maybe more.

Is it still worth it to follow these people (they're not my market), just to grow my account?