I have a related question.
In my game there is a level selection screen, where players can choose level number, then click Start button.
I want to show interstitial ads before the level starts.
How long does it take to "Preload interstitial"?
Should I do this after player hits Start button, will there be a long delay?
Or should I do this in advance, on start of the level selection layout? How long can the preloaded ad wait to be shown? Will it expire if after 1-2 minutes player still hasn't decided which level to play?