It was simpler than that, it just limited the number of gains you could make per 8x8 cell, but moving out of that cell and into another (in any direction) reset your ability to gain skills. Due to how players moved around in the world, that was sufficient to prevent macroing in-place, but since nobody knew how many cells it remembered you being in, AFK levelers just traveled around the entire world continuously in a boat.
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It was simpler than that, it just limited the number of gains you could make per 8x8 cell, but moving out of that cell and into another (in any direction) reset your ability to gain skills. Due to how players moved around in the world, that was sufficient to prevent macroing in-place, but since nobody knew how many cells it remembered you being in, AFK levelers just traveled around the entire world continuously in a boat.