How does it work?
When you create a lobby or you already are the lobby leader for competetive or wingman matchmaking, look at the bottom right corner (where you would see Prime Matchmaking before the update).
You will see "Use trust Factor Matchmaking to find matches".
It's already selected for you, so you don't have to select it manually.
If you prefer Prime Matchmaking, just click on the icon or the text and you will be searching for Prime matches.
How trust factor is calculated; Now this is the complex part since Valve did not reveal all factors used to determine your Trust factor, but rather gave us a hint what is used.
Times you have been reported for cheating.
It's hinted that reports for griefing also play a role.
How many time you have spent on Counter Strike: Global Offensive
Time spent on playing other games
A Matter of Trust
So what if the Prime system was re-imagined using a wider range of factors? We started with that question, and have been experimenting with matching players using observed behaviors and attributes of their Steam account, including the overall amount of time they had spent playing CS:GO, how frequently they were reported for cheating, time spent playing other games on their Steam account, etc.
We call this system Trust, and these factors considered together form a player’s Trust Factor.
Please note that the Trust factor used to find a match is in fact the lowest Trust factor in the lobby.
So as you can guess, if you're playing with someone who often got reported in the past or has a bad status in the Steam community, he will have a low Trust factor which is used to find a match.
("We use the lowest Trust Factor of any individual in the party for matchmaking purposes.
This does not mean your trust level will decrease, instead, it means that you will have the same trust level as the people you are playing with (in your lobby), but once you leave the lobby, your trust level is the way it was.
Other speculated or confirmed factors that can affect your trust level: These are the factors not mentioned by Valve that may potentialy affect your trust factor
VAC / game ban(s) on your account
The trust factor of your alt accounts.
Valve has the information of how many alt accounts you have and calculates your trust factor based on them, too.
Your friend list.
It's quite obvious you don't want to play with someone whose friend list is full of VAC banned accounts.
The amount of forum bans / community bans (including trade bans) you received.
Considering that Valve looks outside for your hours in other games for the trust factor, it isn't too far fetched to say they will look for your bans, too.
The age of your Steam account
Your cooldown level.
Repeated offenders have of course a higher cooldown level and show they rather blame the game for their cooldowns than caring to reduce it.
The amount of times you got voted to kicked (if you have a cooldown for being kicked too often this either means your cooldown level already was high or you really are the problem yourself).
Team damage you dealt in past matches.
If you are close from being kicked automatically from the server for dealing too much damage to your team or even kill 2 mates on a frequent basis you are no reliable team mate.
There are many more things that affect your trust factors but these where the ones that are most likely to be chosen by Valve.
How to increase my trust factor?
Just try to be a merit and don't damage your teammates, play well, get commends and avoid bans and cooldowns
Feel free to check our other guides;
Huge thanks to Echo No aim and Vault Hunter
for editing this guide top notch
Feel free to ask any questions below, and if you found this guide helpful, be sure to rate it, it means a lot to us since we worked really hard on the guide.