Well two reasons for me...first superglued zoas normally look far worse than the place the colony they came from so seeing the mother colony gives you a good idea of what to expect once the frag recovers and grows out. Secondly I like to make sure I am getting something from an aquacultured mother colony and not a poor coral that was purchased and hacked up to make money. One who takes the time out to aquaculture a coral and sell a frew frags is a propagator or coral farmer in my mind someone who cuts up a mother colony only for profit is a butcher.