Keep in mind there are thousands of radio owners. Sure, the biggest understand what you're talking about. But the rest don't. Even the NAB has no control over some of them. And putting your content on digital apps costs money. In most cases, the costs is greater than the advertising revenue. That's why Pandora has yet to turn a profit, even though it keeps announcing revenue increases. The whole digital radio business is a revenue stream for the music industry. They are the only ones making money, and by the way, they're not happy with the rates. So while the listening public is shifting its listening platform to the internet, they're unwilling to pay for it. Sure, Spotify just announced their paid service has 30 million users. That seems like a lot. But when you put it next to the number of free users, it's a drop in the ocean, and they're not making money either.
At some point, radio listeners are going to have to realize that listening on the internet isn't free. It isn't like broadcast radio. The costs are greater and the revenues are lower, so it's no way to run a business. It doesn't matter if your app has 50 million users if they're all listening for free. That may translate to a monthly "radio fee" that'll show up on your ISP bill. But what about the move for free wifi? Then who pays the radio bill? Let me know when you solve that problem.