LOL these answers. The Loss Prevented is actually a system that prevents Low Elo players using a high elo friend to gain wins.
Example; A bronze player so happens to friend a person that is a Platnium player and has him try to carry him out of bronze
I dont remember if the winners would gain elo or not since its only happened twice for me but the losers wont lose any elo.
THAT is what "Loss Prevented" is not some technical difficulty security.
If you havent noticed, any game thats being played while servers go down are either played through and the game is recorded or the game becomes unplayable and the game never shows up on your match history like it never happened