"My guess is that they offered you the chance to research some strange incomplete cultivation art with a colorful tale behind it that makes it seem it hides more secrets than it seems and with how giddy you were, the art is likely a rare one that not many have interacted with.
Then with the cultivation art out of the way, they must have tagged at your other proclivities, and when it comes to proclivities there is only one that goes toe to toe with your incessant desire to pull one over the Order, and that is food.
Did they offer to fund all your meals there? Though somehow that feels insufficient. The Deer Mountain Kingdom isn't exactly the Three Fires Empire or the White Baobab Kingdom that are renowned for having good restaurants.