Backfill priorities not working as expected for iAd in 3.0 devices (need documentation) about adwhirl HOT 7 CLOSED

Hi Thomas,

Depending on your app and fill rate this is definitely possible. Also, were you 
using the same AdWhirl SDK key in a 3.x app? If you did, the 70% for iAd will 
be ignored, and custom ads will be bumped up to 100%, further skewing the 
statistics.

Is there any more information you can provide?

Hello,

I don´t see how these statistics are possible. AdMob fill rate is almost 100%, 
iAd fill rate is extremely low because most ads are requested outside the US. 
When I assign 70% to AdMob, it works well. When I assign 70% to iAd, AdMob ads 
should be requested instead in most cases.

iAd is not ignored, I do receive some iAd ads. This version of the app ist the 
first version using AdWhirl, so there are no 3.x versions of the app with 
AdWhirl.

Is your app 4.0-only? Did you change the deployment target to anything lower 
than 4.0? If so, 3.X devices are running your app, and those devices are always 
show custom ads.

The app supports 3.0 and above. 3.x devices are running the app but why 
wouldn´t these devices show AdMob ads instead of iAds? According to backfill 
priorities, AdMob should be chosen, not custom ads.
Is it possible at all to have iAds shown whenever possible (-> 100%) and use 
the remaining capacity for other ad networks (-> backfill)? Will 3.x devices 
then show no ads at all?

I think there's a misunderstanding of how backfill works in this situation. 
When a 3.0 device receives your configuration, it drops the iAd portion 
completely. So with your configuration -- iAd 70% and custom 30% , to a 3.0 
devices it is as if the iAd portion does not exist. 3.0 devices will not even 
attempt to fetch iAd ads and so there is no failure, hence there are no 
backfills. Normalizing the percentage, it is equivalent of having 100% custom 
ads.

To achieve what you want, you should create two sites in adwhirl. And in your 
app code, return a different adwhirl id depending on whether iAd is available 
(or the OS version). Than you can configure each adwhirl site differently.

This seems to be a signal for us to write clearer documentation wrt iAd and 
older, pre-4.0 devices.

Hey Tom, can you add this to the helpcenter docs somewhere?

Thanks for updating.