Ok, we know that the definition put forth is that of an Asetian vampire, and does not define all the types and variations of the vampiric nature of all beings.
Asetians have conscious control over their reincarnation cycle. Their divine nature, their energy body (the subtle / astral body), Shen Centers and their soul are unlike their human counterparts.
This difference in subtle anatomy is the reason behind the vampire’s energy need. The highly developed energy metabolism demands a higher level of energy to maintain its internal balance while incarnated and to fuel their energy abilities and powers.
I know the Asetian Bible works as a beacon for Asetians. So the calling home of 'lost' Asetians is known. As for the Dark Kiss, I am almost certain it has taken place on a number of occasions from my observations, but I am not conclusive in any way about those observations.
What are your thoughts?