EDIT: As the OP's question about why their G+ submission was declined has been answered, the thread has served its purpose and has been closed.
For context, here's the full text of your post:
On the beggining I read that LOLs player selecting system is based on ELO system... no it is not. ELO system could not deal with team-making system. After that I have heard that this is not ELO system, but... MMR. Unfortunately oposite to ELO system, mechanics of MMR is absolutely unknown. Nobody knows how it works, there is no information about player selction system algorithm.
After few thousand games I just realized taht there is no rule with who we will be playing in one team and mostly players will be selected completely randomly. Lie is the statement that in one team player are slected with similiar experience (or MMR whatever it means).
All of this suggest that LOL is PAY4WIN type of game.
Had this post been in General Discussion, I probably would have left it. In Gameplay, however, it's considered low-effort.
Matchmaking is sketchy as a Gameplay topic to begin with, as players don't have much understanding of internal system mechanics, as you point out. One of the purposes of Gameplay as a board is to help players grow and adapt to become better. One cannot adapt to the matchmaking system. It's also worth noting that Elo never intended his system to be used for matchmaking, except maybe in the most general sense. Elo is better intended to give an idea of the relative strengths of two players.
You then go on to make some unsubstantiated claims about MMR being "a lie" and jump to the unsupported conclusion that this somehow makes League a "PAY4WIN" game. I don't know how you meant to square that with the fact that League is free to play, but ultimately it's the kind of discussion that just gets derailed into bickering and personal insults, which is why it was removed.