The numbers the station has are very likely sustainable and they are at a level that is competitive among the other Hispanic targeted stations in the market.yes I am referring to KXXM which was originally at one time KSAQ Q96....again nobody is listening to this station ...and nobody english or spanish goes to the radio and cares about AD's be it in english or spanish who are we kidding here...sure the sales team can convince advertisers ur money is better spent here but it's garbage it's a crappy format with zero sustainabilty ..srsly if you think that's what a radio listener cares about get out of the biz that's why terrestrial radio is tanking in general
If we look at the "original" mainland station with this format in Miami, we see that it continues to be very very strong and is billing well. The concept is valid, because it appeals to Hispanics who like English language "pop" music and have always liked it. All over Latin America there are many, many very successful stations doing that, so the idea is perhaps 70 years old... or more.
What limits that format in San Antonio is the percentage of people who are Spanish dominant who like English language music. In Miami, there is a huge population of 25-54 Hispanics who are refugees from nations with violence or totalitarian governments but who grew up listening to English language music. San Antonio is less of a destination for that kind of immigrants. But the format is not "garbage" and "crappy".