Cultivation Techniques are single-use, and often the other party would indicate that they already possessed them.
As for Spirit Stones, after one or two transactions, the income could no longer cover the expenses.
It forced them to push their lower-level Cultivators to mine and produce more.
Some of the more powerful forces even established exploration teams, going to the Time-Space Turbulences and the Spiritual Mist regions to find those wild Small Worlds.
The ore veins in most of these Small Worlds had not been fully exploited.
Once found, these major powers could mine a large quantity of Middle-Upper Grade Spirit Stones.
Although finding a wild Small World relied on luck and presented certain dangers,
after the sects continuously increased the bounties,
venturing into the Time-Space Sea Domain in search of wild Small Worlds became the most sought-after profession by the mid and lower-level Cultivators of the Lower Realm.
