Trading cards at NPC

Hi, i got an idea for massive QoL with trading cards. Why dont You allow more than 1 full stack in Lily Roth? With more expensive cards it doesnt matter that much but with cards like emperror's luck or other ( for example cards for alternation orbs) it would be great. Spam trade and currency would go in our inventory. i was farming t17 maps strongbox and i had massive amounts of these but time consumption was to big to actually trade them and it was painfull. we are loosing a lot currency without this. And another idea is to let us have more than full stack ( for example emperror's luck have 5 cards to full and You could increase maximum amount to 50 of any card in stack) so it woudnt affect much our inventory with picking it up.