Extremely Disappointing !!!
It doesn't make any sense to rely on 3rd party plugin, especially for monetisation purpose.
And the thing which makes my blood boil is that there are no tutorials available for implementing them. All engines,even Godot have that. Because of this my admob account got banned (as I did not knew that interstitial has to be created once,not everytime during a session)
In fact when 3d plugin came,it was a pinch for me as I believe monetisation should have more priority than 3d plugin