AdMob revenue and alternatives : Impression vs Clicks
I actually use AdMob for my Android apps.

For the moment I have zero revenue even if I'm approaching 1000 impressions. So I conclude that AdMob is based on CPC (cost per Click) system (because I have indeed no click).

- Is it always the case ? Or does AdMob use also cost per impression system sometimes ? If yes, can we choose the use rather this cost per impression system ?

- Otherwise, is there any alternative ads network that pays you entirely, or partially, with cost per impression ?
AdMob revenue and alternatives : Impression vs Clicks
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I actually use AdMob for my Android apps.

For the moment I have zero revenue even if I'm approaching 1000 impressions. So I conclude that AdMob is based on CPC (cost per Click) system (because I have indeed no click).

- Is it always the case ? Or does AdMob use also cost per impression system sometimes ? If yes, can we choose the use rather this cost per impression system ?

- Otherwise, is there any alternative ads network that pays you entirely, or partially, with cost per impression ?