Fucoes Dungeon was constantly being used as an initial area for new Maguses and Familiars. It was even more popular than Lungan Forest since it was far from any Magic Beast Territories. As mentioned before, that also reduced the chances of killers appearing. Also, transportation to this dungeon was free to those who accepted contracts related to it.
Today, an airship landed on the south side of the dungeon entrance, and several Maguses and Familiars came out, looking forward to what they could get. The Ventis Sect Entrance Exam happened pretty much all year round due to its enormous territory, so new Maguses and Familiars constantly arrived on the planet. Naturally, these new guys constantly flooded places like this since most of them didn't have a single penny to their name.