I realize a huge difference between official and private servers: In official servers you kill 3 times the mobs because you're always dividing the exp with a large party. The volume of kills is so much higher it's crazy. You're always on agi up, with buffs, killing monsters in one or two hits.

Here's my card outlook doing the generic party leveling in LATAM with a handful of characters:
I have 4 Spore cards, 2 Orc Warrior cards, 1 hode card, 2 roween cards, 3 venatu cards.
The craziest map is magdun, I have 4 Blazer cards, 2 Diabolik cards, 2 Nightmare terror cards and 2 Deleter cards, 10 cards from 1 single map.
I also have 3 Centipede cards, 2 Tatacho cards, and 1 Mountain Lion card, 6 cards from one map.

The difference in the partying scene justifies having a triple card drop rate relative to the exp rate in private servers. In the actual game you're actually getting cards from every place you level up at, the card drop feels like a seamless feature of just getting extra stuff from the spots you level up at.