Phoners are great for small markets. The first one I was involved with was in 1988. A sales rep said she had sold a call in. I thought it was crazy. 23 years later that same business owner is calling in and she is a household name in the town, sometimes we talked about store specials, some days we talked about the Grammy's the night before. Everybody knew (knows) this person (business), now.... she is on 5 stations in the market.
Morning and afternoon shows.... why not wrap in this call with events of the day, and the sales pitch for the client too.
Just think about it, a realtor could feature the house of the day. Restaurant - meal of the day. Realtor - house of the day and so on.
If your client (the business) becomes a household name, you keep the sale, the client gets the business, life is good.
Sometimes it is a ego thing for the client, but it does get results.