That could be an option, but I see it as risky, you are then having to deal with things like, if advert is closed reload scene, then if an advert fails to show or is delayed you could find yourself stuck on the game over scene, also if people are playing without internet my current set up would just pause the game on reload then you press resume, where as the other option would be waiting for an advert to close that is never coming. There is probably ways to do it with if advert fails to load etc. I feel I took the safer option.