Salem is limited in what they do. That might be a problem if some of what they are doing is not as popular as it once was, or if they have a lot of competition. They have Brokered Preaching, which in general was always a profitable format for them. They also do CCM (K-LOVE will compete with them in markets where they have CCM stations, since EMF only avoids putting K-LOVE on in areas with a non profit CCM station), Conservative Talk, Conservative and Christian Media (Podcasts, Websites) Spanish Christian, Business News, 3 Classic Hits stations, a Country station, a Sports station, a Brokered Ethnic station, a few secular Spanish stations.
They also operate what I would consider the Christian Westwood One. The Salem Music Network, which feeds CCM, Contemporary Worship and Southern Gospel to other stations. Cumulus runs it on KAAY. Saga runs it on some of their signals. Non profits. There's also the Salem Radio Network which has their syndicated shows, and their news network. Lots of stations run SRN News. VCY America carries SRN News (They used to use USA Radio)