What is our billing metric? Liza Azran -Mobfox June 04, 2018 11:56 Updated Follow We bill on impressions based on CPM. Related articles When does Mobfox fire the impression trackers? When is the DSP NURL (win notification) being called? Does Mobfox support more than 1 impression pixels on Native Ads format ? Comments 0 comments Article is closed for comments.