"Collective Soul Oath"
Ainsley told her allies that she intended to let these 'treasure hunters' explore the island on her behalf.
That way, they didn't need to waste any human resources to explore the island.
As for whether the treasure could be taken out or not, it all depends on the rarity.
If it was something as rare as the inheritance stone, none of the hunters could take the item away.
Ainsley planned to make things clear for the hunters too. After all, they should know that they're digging treasures at someone's island.
It's not open to the public, but the island's owner was generous enough to let them scrape some benefits.
How kind!
"This plan will also build a good image for the public. We won't want them to think that we are monopolising the island, right? With the treasure hunting project, it won't be a problem anymore."