Bro, love your work and full disclosure, I have made more money on @exhaust than I would have simply posting on my own. I think 20% is fine still for now and think it could come down if there was a larger number of users posting their activity. I think growing exhaust is the way to go as it will hopefully get more people involved. I have been pretty tied up with other projects at the moment but really want to help grow the community more and hope this might help us come to a conclusion that everyone agrees on. For the time being, if I could choose my own percentage, I would still have it set to 20%, even though I am getting my butt kicked weekly in both runs and rides.
Hope this helped.