There were many low-levelled players here. Not everyone liked to follow the normal method of grinding different monsters to level up.
As for raising their levels from doing quests, that was a pipe dream. Unless they had extremely high Charisma values, it wouldn't be possible to raise their levels from doing quests alone. Most people would need to rely on grinding monsters to gain EXP.
There were also many people who came here for business purposes.
Stronger players would party up with four other weaker players in a party and charge them for power-levelling. Each player would pay a certain number of silver coins. In a day, players would be able to earn around 100 gold, which was already a much higher pay than normal workers.