Killed 130 BAMs for 62 FC.
So if you want 500 FC for a costume or weapon skin, you'll only need to kill about 1000 BAMs. IMO that is a horrible drop rate. I even got drops of 3 FC from a teralith and 2 FC from a basilisk. Previous drop rate was bad enough, but to nerf it even more just because the shop was updated is sad.
Unless you're farming for XP, it's not even worth farming BAMs anymore, so farming for FC is really a waste of time. Just would be nice if there were more incentive for honest players to be able to farm for coupons like we used to.