One of the many things that made Hera so powerful was the information she holds. She knew everything that was going in and out of the underground, and even the movements of the authorities. It was as though there was never a secret she didn't know, and how she does it had been the biggest mystery those who were after her took time to have answers.
And even the answer they got originally came from her. They wouldn't know what was her secret until she told them on her own. Whatever the reason she had that time, no one truly knew. However, one fact remained.
Hera was the worst type of villain.
In this day and age, information meant power. But alas, holding such power also attracted danger beyond words.
Just as they said, ignorance was bliss.