The problem that I have with convoy/plunder is that the convoy can only get one SS mission, while plunder can get 3 without being forced to spend ingots like convoys. Doesn't make sense to make the system that heavily favor the strong. Convoy, I think should get free SS missions until they hit their 4 max per day. Even if they were to get plundered all 4 times they would still go home with more than 15 coupons.