I knew I'd find the source on the Message Board content above.

Some is here:

In inflation-adjusted dollars, radio revenue is off about 2/3 since Y2K. Every expense, from office rental to taxes to insurance, utilities and salaries is up.

New York City metro area radio listening "PUR" (persons using radio) was the equivalent of about a 19 to 20 share back then and now it is around a 6 share (6 AM to Midnight, Mon-Sun).

So how can a radio operation justify yesterday's expenses when the audience is moving to one-to-one streaming services and advertisers are going there too?

Source: https://nyrmb.com/messages/485426.html

David Gleason, certainly no dummy!