The Bolg Realm was indeed lacking in a lot of areas. In response, the Kun Realm planned to fill them all up and then help birth more Gods, thereby elevating its foundation higher.
Feifei's task was to create cultivation techniques for the Bolg Realm immortals, allowing them to cultivate all three paths. Basically, her task was to establish Soul and Body Cultivation in the Bolg Realm.
Her helpers were Soren and Wally. In the meantime, Zamura worked on upgrading their weapons using the latest techniques researched by the Kun Realm after transactions regarding the various techniques with countless other realms.
This was what the Kun Realm was doing the most. They were buying information, techniques, Godly Abilities, etc., from every single realm, researching upon the ingenuity of the various realms to adapt them to their own.
As for the payment?
Heh!