Ad Mob gives the option to use multiple AD Networks, to increase "fill rate", as it states on the site.
Also, it orders automatically from highest to lowest CPM.
Would it be logical then, to subscribe to all networks and implement them all, if you display a banner or interstitial in a game on the Android Play Store (or App store)?
Is it smart to do this?
Or is there a reason why I should only select a few (or none)?
Thanks for answering in advance.