Re: 2 Step Varification.

I like the idea but hey hear this.
In counterstrike they work with a trust level, if you are X trust level or buy Prime you get into trusted servers that queue players around your trust level.

So if you play a lot and have 2factor enable, this could boost your trust level.

If you don't have 2factor enabled you have a lower trust level and you will be queued with less trusted players.
It would improve account safety what is always important and could improve matchmaking.

But just thinking out loud, I could see over some basic pitfalls.