One would think that a company that owns all these services you mentioned would be thriving. Instead, they are in a World of Hurt. Mass layoffs aren't a great look for a "thriving" company/industry.
As BigA has said, they are thriving.
But they have made a decision to centralize much or the operation of each terrestrial station because that is the way all other media is now being consumed. It's the model in most other nations of the Hemisphere And Europe and much of the rest of the world as well.
The top down approach that Iheart, Cumulus, Entercom, etc..have used for the last 20 years is imploding. The bland cookie cutter product they offer is worthless to the public. Other entertainment options now exist. Radio is an anachronism to a large percentage of the population. They can get what "they" want on demand somewhere else...
There is nothing "cookie cutter" in recognizing that, due to the Internet and streaming, there is vastly more consensus in music tastes nationally than there ever was. Combine that with each owner's ability to have many stations across the company and you have a network just like Red, Blue and Columbia in the first years of The Golden Age of Radio.
What has changed as well is technology and regulation. We can run a station from 2,000 miles away as if it were local. We can do the transmitter readings, program the music, integrate the commercial logs with the music logs, do the "live" breaks and everything else (You don't think "live from Burbank..." wasn't really recorded, do you?).
Most of the rest of the world did this 40 or 50 years ago. I linked stations in Ecuador via microwave in the 60's and programmed to the whole country back in the late 60's, long before fiber optics or satellites. So did countless other nations where big market programming could be thus brought to smaller markets and sold efficiently.
Obviously, iHeart believes this is a better model to sustain terrestrial radio well into the future even as most of their business moves to newer platforms.