you have it a bit wrong on the plunder side
if you repel aka win against a plundere you just get thrown into the list again and other people can plunder you its not like the one how tried before calls someone to help him
if you lose as a plundere you get nothing from that 1 try

what are you talking about you cant just call over stronger players as plunderer other people have to plunder you through the interface or the same can try again but there is no such function to call someone for help in plunders