Ranked Game where 5 didn't play

So I just duo queued with my friend, I am Silver 1 going into Gold 5, I was in promos. We enter a game and none of the people show up to lane but instead they are typing in all chat and trolling. This is a ranked game. 1 of them dced and the rest stayed in fountain until we ended by all 5 pushing mid. Only 1 , their blitzcrank came out and tried to chase us around but didnt do much. Has anyone ever seen a ranked solo queue game where the enemy team doesnt even play and you get a free win? Maybe it was because their nidalee was afk from the beginning they decided not to play? Not complaining because I got a win but I have never seen this LMAO. Check my match history I won at level 7 lmao and before 20 mins. #FREELO