Just think about it: there's normally a top "whale" or two on your server/servers and if they're not in your group then there's a pretty good chance you'll eventually run into them if you're trying to plunder from their group. So... pretty sure most anyone trying to plunder other players, by your definition, would end up being a "casual plunderer."

Well, I think I'm counted as a 'casual plunderers' by your definition, since I only plunder if I'm hit and can't protect my convoy in order to preserve my source of coupons income per day.

I'm not even a casual plunder. But I do it randomly so people won't know if I plunder or not.

I don't really do plunder. I do when I see ss otherwise I just do 2 ss convoy and off the rest of the days. I don't like to wait since our serv is dead.. Also I'm one of the top of my serv. So most of the protection is bellow me

Can't you just exchange plunders with a friend from another group? Basically, you plunder each other SS. 2x convoys are 40x2 coupons, exchanging plunder will net you 40 + 25 (plundered) + 50 (plundering) = 115 coupons, almost 50% more coupons daily.

It's great since there is no double account abuse...