It is a little confusing, will admit that. Mainly because of all things are setup here in the U.S. we must partner with a provider to keep us legal.
Celt Rock Radio is part of Live365 and has 60 free listener slots broadcasting at CD quality. You can purchase a Live365 VIP account for about $70? a year that gives you access to thousands of stations and also you will not hear ads.
All of our Live365 channels have a generous free listener capacity thanks to our financial supporters. So, you do not necessarily need to purchase a VIP Live365 account, although it might make it easier and they have a desktop and mobile app that comes with it.
Hope that helps!