This has finally been changed! Rather than this giant post every update, moderators now collect 5 cards of choice + 10 random cards every month. This has a few limitations:
1) You must comment with your five cards of choice
2) You can't retroactively collect cards--if you forget to claim cards for January, you can't claim the January cards in February.
3) You can collect them at any time during that month, though. You can pick two cards at the beginning of the month, then three at the end. I don't care about that.