I have submitted my app 11 days ago. First day it run on my test device for more than 4 hours of active use and about 2 - 3 hours of "passive" use (not taping on the screen often). Now after 11 days the developer portal still reports only 190 minutes of total use. How is it possible? I see that some people downloaded it so the number should be much more higher (At least higher than 240 minutes - the time the app run on my device eleven days ago).
Also when I run the app the welcoming Amazon Underground AD shows only in about 10% of the application starts. Does it mean that if no welcoming AD is shown the minutes of use are not recorded?