In JP, that happens with the princess cards from Coli so everyone can get anyone they didn't vote for (a move I'm surprised hasn't been copied by Nutaku yet, since it would be an excuse for more money), but for ranking cards, they show up again much later (sometimes a year or more), but instead of just being for the Top 1K, they end up being an additional prize for Top 100.
"Didn't put enough effort in to get her the first time? Now you get to bust your ass ten times as hard for her this time."
They're just for whales. The more damage you do to an enemy, the more points you get when they're defeated. The Lv.100/Lv.200 enemies are for people who need a ton of EP if they're willing to spend the items for it.
With this event giving less advantage to players who throw money around, I've had to beat up a few of the Lv.100 enemies to go from 2600th place to 885th.