Oh I see what you mean! Yes that's a great point.

I assume they will have some kind of pay-per-second or per track feature, but I have no idea how they will work it. I guess each one of the 3 I've come across so far could also have their own methods too?

One might be upvote based, another might be per second, and another could be per track.

Maybe there are other potential ways too?

Will be interesting to see what happens! Looking forward to the time when at least one of them is ready to go. I'm on all their email lists, so should be notified when they are.