Yes, Idagio pays per second.
For the popular genres, Darol Anger recommends Tidal. I don't know details of their payment model but it is more fair to musicians than per-stream services. Mr. Anger is an extraordinary violinist whose work crosses genres--bluegrass, New Age, classical (such as Turtle Island String Quartet). He's had a long career and is still very active. I buy his albums on sight.
Also, Bandcamp seems to operate as a musicians' collective, offering streaming, downloads, and physical media a la carte. When you buy something, you can include a message to the musician. It's nice that in our impersonal modern era we can still find ways to support the artists who bring us meaning and participate in communities of shared interests.