One of the ways to make profit running an online/internet radio is to sell radio ads (air-time). The best way to sell radio ads is to convince your clients that they need them by showing them the bottom line. The bottom line to convince them are listed and shared in here:

https://socastin.com/blog/how-to-sell-radio-advertising-air-time/

After checking, share your before and after experience with us. Let's share ideas and wayforward with you.