I've found it's better to snipe from directly behind/beside the trucks if your whole team is hanging out in that corner for one reason. You are eliminating half the spawn points on the map basically forcing them to spawn in one of 3 spots, 2 of which are instant death. If they spawn on the streets by the little building, the sniper can more often than not grab instant spawn kills. It's money. The other 2 places they'll spawn is through the doors that swing open or back in by the scarab. If they spawn by the doors they will most often be alone with no backup and try to run in 4 vs 1 for an easy kill.
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