I'v noticed a huge trend.
I will see someone who plays incredibly terribly in one of my games. I'll look them up on lol king, notice that they were bouncing up and down in bronze for 90% of the season then all the sudden between july 15 and august 1st they went from a bronze 3 mmr to a silver 2 mmr. Oh and when I look at their match history I see the same bob, jim and dylan on their team every game. Wow.
Its odd how giving players the easiest way to boost ever would make people boost their friends. Wow just wow.
Guess I better get my diamond friends to hope on their smurfs and boost me to high plat.

. I had just gotten gold on the account so I was literally gold 5 0 lp. I noticed at the loading screen I had 3 teammates with platinum borders, which kind of freaked me out for a second. Looked up stats and saw 2 of them were plat and the 3rd was currently gold 1. The enemy team had 2 plat players and the rest were low gold with 1 silver 1.