There are some hints why CPM rates are low.
⠀
1) Not reliable traffic source. Don't purchase traffic from not reliable ad networks.
You will get bots, bots don't click on push notifications. So, advertisers won't pay you.
⠀
2) Tiny amount of traffic. There is no point to make any conclusions when you get 200-
500 impressions and several subscribers. It's better to attract >10,000 impressions.
Remember - the more traffic you have, the higher your CPM.
⠀
3) Old subscribers base. When you have an old base, users click on push notifications less
frequently, thus, CR drops. So, the CPM doesn't grow and becomes lower instead.
⠀
We suggest you attracting sufficient amount of traffic from different GEOs and reliable
sources on regular basis. 
Contact us:
Email/Skype:
[email protected]
Website:
https://realpush.net