I think the setup by Leo Finance team is much better than DBuzz. Different types of services shall get their own reward pool. Something DBuzz had major issues with the HIVE community before they limited the maximum payout. And what I read from your post, this limit is optional. Leo is planning a different token for their microblogging service.
I'm sometimes wondering how many (or few) users actually press the play button of some music. Some do, but many don't, I think. I do, but have to decide to give a powervote or not :)
Just checked Audius, installed the App on laptop and subscribed. When subscribing, I thought: COOL, they link in Spotify and Soundcloud. Tunred out I was just reading and concluding too quick. They just compare their bandwidth quality with the other services. I do hope for the best for Audius, but again one of the so many silo plays in music crypto platforms. Getting a little sad over this :(
Keep the cool post coming in the HIVE chain, and we'll meet more often :)