Ouch, really? So whats the point of those?
I agree, it would make much more sense if these actions would preload images for the next layout(s). Unfortunately, no, they only allow preloadinging images from other layouts to use in current layout.
I believe if you create an Interstitial/Video just once, you can use the "if ready = show ad" many times...
After you've shown an interstitial/rewarded ad, you can't show it again. (Well, maybe you can, I haven't tried it, but it's pointless to replay the same ad.) So you need to create (load) a new ad.
Why not making things simple as: ....
Is Interstitial Loaded and On Interstitial Ready mean the same thing, but one is a condition, and another is a trigger.