Other than Snow and Sparrow, the golden bear kings, who re-cultivated after forming a contract with him, turned into completely different beings and became powerful.
Zan the little golden bear king could fight a low-level king realm expert for a while with just a level 1 bestial law along with his re-cultivated artifact and the power he got from the re-cultivation.
So, he chose them as examples to show how powerful they could become after their re-cultivation.
"We are waiting for the re-cultivation techniques for a while now, master."
"Yes, master. After seeing Zan and Dan, we wanted to become powerful."
.
.
Actually, Ajax didn't need to tempt them in choosing the re-cultivation technique because they were more than willing to re-cultivate and turn into humanoids or humans.
"Good. Take them."
Soon, Ajax gave the crystals in which a re-cultivation technique was stored in each one of them to all his contracted spirit beasts.