Problem is, one game doesn't tell shit about a player. In that game he can be completly different then how he really is. In premade test games everyone is the perfect dota player: buys wards, listen to others, never flames, tries to be near his teammates, picks what hero is needed or what other say, etc. Or even opposite: a good player might have a rly bad game where everything just goes wrong and under pressure he does nothing good. He dies stupidly in a gang (and his mates will be pissed and say OMG NO MAP AWARNESS), he makes a spell 2 sec too late (again... gah! ur so dumd..)... pressure, flames, etc. A single game will show nothing. That's why I ask others to vouch or unvouch based on different games they experienced at random times.
Further on there's no possible way to monitor this in a good way.
I for one (and I believe I speak for all admins) do not have the time necessary for yet another time consuming task just to let someones friend gain early access.
!nosupport.