Why do most things made with VAM look the same?

[HDiddy]

Curious on peoples thought. Maybe it is me, but I feel a lot of the long form content made with VAM all looks a like. Basically I seem the same thick Asian doll model made famous by District 13 (I believe) and the same male models all the time from different artist. I mean VAM is basically porting things in from DAZ i don't understand why everyone keeps using the same models.