A number of airlines have dropped int'l F for a reason. If your client base or likely base can't support it, why waste the effort and money? All you'll do is encourage the constant "cost cutting" which can erode all of your products, and thereby erode your profitable business segment. Given the general US market, I think F is difficult to build a niche on. Be like NZ where you have a very solid and desirable business product that you can actually sell rather than merely upgrade.