You will get kicked though, u have to move in different directions and shoot. Games last max 11min not counting queue time and loading. So more like 15 min, assuming you lose 3 you will have 6 marks and 30 rep which is about equivalent to the mark for mat trade. However it will take about 45 minutes. If that is less time than than it took you to load, patrol for 50 mats, and sell for 5 then it's more time efficient. But in general afk doesn't really work without an auto controller