No one knows how, it's all speculation.
Don't damage your teammates (even if they are russian)
Dont create another account on the same PC.
Expensive steam accounts give higher trust factor.
Don't get reported
Don't get kicked
Commend other people
If you get into a bad match with either toxic players, griefers or cheaters, you should just endure the pain and play it through. Don't leave
Dont teamkill/ team damage
Have lots of games
don't kick people
what does this factor affect?
This is the first time I hear about this, I had to read an article in Steam.
Actually the best way to upgrade ur tf is donate (forgot what valve loves?), i created new account with mobile authenticator and bought viewer pass on it, played like 15 matches for pickem rounds challenge, and a lot of matches was without cheaters, griefers etc, teammates was really good, and i played in nonprime lol.