[Question] I am getting 2,022,183(Monthly) Session for my Mobile Game but no Earning ??

Hi i am getting daily traffic on my mobile game but i am not getting any income as that version have less ads and old admob SDK.

People don't download my new updated version and i am still getting new users from old version.

Now my question is is there any way i can still send message to my game android user ??

In admob i am getting 37 cent or less then 1 $ from 40,000 request 2,400 impression

Fill rate is also less .so what can i do to increase the fill rate .

It's a Rickshaw Game main traffic source is Bangladesh.

I am planning new update but it will take some time..

Thanks

why won't you update SDK?
or make old version not available and force to download update, like all apps do?

i can't force update as in android there is no option and if i make old version unavailable then new old user will not come to new app
as when i made that game i was a newbie i have not made option like force update and other
and now google does not have any option like this i can only update the app and 1 notification will go like this app has a update but no effect at all i am still getting old version new user in analytics