AdMob's Native Ads low eCPM
I've been experimenting with Native Ads lately, and am finding the eCPM very low.
My setup is: between certain screens there is a "loading screen", a native ad and some text then a continue button, which appears after 5 seconds. I based it off the NYT's app with pre-ads on Wordle.
Right now it's: 1,500 impressions with US$0.28 eCPM.
Is 5 seconds way too short for this style of ad? I don't really want to spam users with interstitials. If so, what's the recommend amount of time?