With all the attention that Pandora and Spotify get as the leaders of the music streaming market, it’s easy to forget about smaller services like iHeartRadio. The word “smaller” is barely even applicable too, especially now that iHeartRadio has more than 70 million registered users. It’s important to note that “registered” doesn’t necessarily mean these users pay any money, in fact, it doesn’t even mean that they’re active. Even so, that number is nothing to sneeze at, and it’s good to see that even the smaller music streaming services are growing.