I've always thought Salem's revenue model is a bit different than other owners. In most of the top 50 markets, and some markets between 50 and 100, the company operates a Christian Talk and Teaching station. While Salem might sell some commercial time between programs, those time slots are sold as brokered programming. The evangelical hosts buy the time, appeal for donations to their ministries and then wait for the dollars to come in. Honolulu's over-radioed market and high overhead may not be that important if those preachers get their donations and they pay Salem for the time.
The conservative talk format is also a bit different. Sure, Salem wants those stations to each generate income. But I think they make most of their profits on a network basis. Its stations run virtually the same schedule of hosts, all employed by Salem. Only in a few markets does a Salem talk station carry a show from another network. In those markets where you can see the ratings, Salem talk stations have poor numbers, usually not even a 1 rating. So I've always thought, most of the sales must be national.