Let's say you're Entercom. You have a high biller in La Grande. Now what do you do?
1) Keep the format and learn all you can to see if it might also bolster billing in other markets you have with a poor performer. You could care less if it's a lone wolf in your portfolio, it's just a successful moneymaker and you're really happy about that.
or
2) You know nothing about Spanish language radio and it's the only one in your portfolio. Forget how well it does, you're changing the format to something where you have expertise.
If Entercom decides they don't want any Spanish stations in their portfolio, I would choose the second option.