When you use a chewing-gun-on-a-string, you are significantly more likely to get a worthless item if you have no worthless items in inventory. So it would be best if the hermit cli command would use existing worthless items before fishing for new ones. Currently, if you request multiple trades (e.g. "hermit 3 clover"), mafia will first acquire 3 worthless items and then trade them all at once.