When Ling Jiazhi's evaluation period began, three Superpower Users, like him unfamiliar and unaware of Ji Tianqi's superpowers, also underwent the Empowerment Transmission experiment.
Without exception, they all failed.
This essentially confirmed that knowing about Ji Tianqi is a fundamental prerequisite for receiving Empowerment Transmission.
However, these three individuals were not kept back for any further assessments, since the number of Superpower Users is limited and those with suitable abilities are scarce globally.
In short, suitable Superpower Users are all busy and not necessarily willing to stay with Ji Tianqi and undergo subsequent experiments—being around several mentally ill individuals with formidable powers and engaging in dangerous heroic acts, the normal reaction of any sane person is to refuse.
If they didn't refuse, then they had a chance to become official members of the Tianqi Team.