Independent Game developer Nathan Harper is the author of Formula Legend an F1 strategy game that is making a decent income for him on iOS and Android. Nathan chose to make it free to play and then inApp purchase - so that is no advertising! Hear his journey and wins/fails along the way.
For the scoring and full transcript go to the StreetHawk blog: http://streethawk.com/blog/2015/02/game-developer-learnings-mobile-user-acquisition/