Why would a company want to own several hundred
(or even nearly one thousand) radio stations?
Seems to me that the original (USA) radio business model
was a good one - create and supply content that local
radio stations would want to broadcast (along with some
national news and advertisements).
Don't own a lot of (or even any) radio stations, let the
locally owned radio stations sink or swim depending on
what they choose to broadcast from content (national or
syndicated) suppliers.
I built my first station in 1964, and it was the market's first Top 40. It became the #1 station in revenue and ratings within the first year in a 30-station market. As soon as I had the money, I bought a second AM and did the equivalent of a country format. It joined the first one at the top.
At that point, I could call on ad agencies where owners of a dozen stations were waiting in the lobby and walk right into the office of the media buyer or agency president. I added another AM, then the market's first FM and then another FM and finally a news talk AM before moving into 6 other markets.
The reason for expanding was that much of the overhead, like accounting, engineering, administration and the like could handle multiple stations without increasing costs. We only needed one office space. The FMs share the same transmitter site. Pairs of the AMs were diplexed, sharing sites, generators and even security personnel.
And having half the agency revenue in a market of a million on just 5 stations out of nearly 40 was very profitable and enormously ego-satisfying. And we had better equipment (first cart machines in the nation, first FM, first stereo, first diplexed AM, etc), paid better and promoted better than any of the other 300 stations in the country.
It was good for everyone involved... so much so that the original 60's staff members still get together once a year and celebrate the good times a half-century later.
See a bit of it at
https://www.davidgleason.com/1964-1970-Ecuador-Main-Page.htm I started the group when I was 18.
Having a single station just would not do it.