12-29 is still a pretty big range for "young users." Those apps that attract 14 year olds are sure to not be the same as those that attract 25 year olds. It would be interesting to see that broken down further to see what the most profitable demographic really is. Young vs old doesn't quite cut it. It mentions 16 & 17 vs 20 through 29, not too much difference, $0.49 average per paying user. This also seems a bit low ($3.07 average revenue per paying user), but then most apps are advertising funded. In the micro-transaction backed browser gaming field that I'm coming from, we were seeing a long term average over $5 per paying user, occasional short-term near $10.