User blog comment:Congo1/QUITTING!!!/@comment-9240827-20141004205412

Sorry but there is logic in selling before quitting, if you're on Android, anyways.

Card prices are dropping like crazy. The people who sold cards like Amaria for 1,600 PP prior to quitting will be in for a huge surprise when they find out Amaria is now worth 40-50 PP and cards that are much better than her (let's just use Ephernel and as an example) are worth the amount that they sold Amaria for waaay back before they quit.

Also, a lot of people give the potions to guildmates rather than giving them cards. Because, think. Many cards are hard to sell. I wouldn't want to put that burden on a guildmate, so why not sell a card, give the guildmate pots, and let them spend it on a card they want?