Thats fine Skull. I tend to agree. But you do get it.
A dedicated 0 Motivation \ Resistance Dueler, with Premium can duel 13 times a day (Energy 150/12 + the energy you gain through the day. She prolly averages $25 + per duel = $650 per day which is good money for World 10. Maybe $2-3000 per day on other worlds.
The only way to keep this up for any length of time is keep your XP earned = zero or you have to fight tougher and tougher opponents.
Me, I like finding stuff.