I guess you were right. To be honest, i believe they should make it so you could choose a trophy for this amount of medals. So that people that didn't make it to the trophy or wasn't playing it at that moment can get some very important cards... And because i know money matters, make it something like 1500 medals + 300feez to get a trophy of you choice
P.S Yeah i know, i am dreaming... That's why i am heading for legendary card that is sell-able too!