Gathering Immortal Island's missions were openly posted, and anyone with the capability could take them on.
As exploration progressed, these missions were updated in real time. For example, if mineral resources were discovered, a mining mission might be assigned. If rare Immortal Medicine was found, the mission would involve searching for it. If a valuable Demonic Beast was encountered, the mission could entail hunting and killing it. In short, whatever was of value in the exploration of the New World would be collected.
Since it was all out in the open, there was no need for secrecy. Zuo Dongxu promptly replied, "We were attacked by Demon Spiders before, right? After a detailed investigation, we found that these Demon Spiders all came from the Black Demon Cave. A Starry Sky Demon Beast once stayed there for a long time, which is why there are so many altered beasts."