I misunderstood the per-play royalty in my previous post on Internet radio royalties. It’s not 8 cents per play per listener, it’s 8/100 of a cent per play per listener. So I was off by 2 decimal places; my apologies, and thanks to commenters for pointing it out.
So the annual royalty would be $40,353.33 for Groove Salad alone. Which is still too much when you consider the share of the total listener market that Groove Salad serves.
[Corrected as per comments, thanks!]