I'd like to monetize some of my broadcasts/streams.
Any way of wrapping my streams in a pay interface?
Basically have premium/pay and free streams.
That is something that you'd want to work with a stream host provider that specializes in providing a paywall for your stream. Please note that this is a specialized service so you may have to contact many stream hosts to find one that can do this for you. This is not a very popular method, but it is possible with the right stream host provider.
A more popular method to monetize your Internet radio station would be to join a stream hosting service that specializes in ad injection who will share ad revenue with you. While this is more popular, you do have to allow audio ads to be allowed within your broadcast.