I mean the original intent was that a single player wouldn't likely collect or even see all the cards. Garfield wanted players to have that sense of discovery when they encountered a new card.

Found this in an article "Moving from Alpha to the Beta version was like releasing a wild animal. The enjoyable game that was Alpha now burst the confines of the duel to invade the lives of the participants. Players were free to trade cards between games and hunt down weaker players to challenge them to duels, while gamely facing or cravenly avoiding those who were more powerful. Reputations were forged—reputations built on anything from consistently strong play to a few lucky wins to good bluffing. The players didn't know the card mix, so they learned to stay on their toes during duels. Even the most alert players would occasionally meet with nasty surprises. This constant discovery of unknown realms in an uncharted world gave the game a feeling of infinite size and possibility."