I remember in the previous post about this a while back, I came up with a Beastiary system that allows you to farm for cards. It's a -bit- like the current soulbinding of gear.

Essentially (x/x = number of mobs killed/farmed):

Kill level 5 Marmot: 20/20 Once enough of them have been killed, you receive a randomized low-tier (1) Marmot card.
Kill level 10 Mole: 30/30 Once enough have been killed, you receive a randomized low-tier (2) Mole card
Kill level 30 Coblyn: 50/50 Once enough have been killed, you receive a randomized middle-tier (3) Coblyn card.
Kill level 45 Vulture: 75/75 Once enough have been killed, randomized semi-high tier (4) Vulture card.
Kill Ifrit: 10/10 Once you have killed Ifrit multiple times, you receive a randomized high tier (5) Ifrit card.

This will help to give people something to do in order to build stacks of cards, open up more achievements, as well as give players who primarily want to play cards more reason to want to do. The numbers and values on the cards should always be random, even if you receive the same card. This keeps people from farming the exact card over and over again and wiping other players clean and becoming overpowered.