I have been thinking about this question a lot lately. Someone had asked me this and I didnt no how to respond. It seems that the ability to buy magic tricks whenever you need to means magicians dont have to be creative and come up with their own ideas. At the same time, buying magic gives you a better understanding of the techniques out there and eventually you will be able to become independant.
Believe those who are seeking the truth. Doubt those who find it. ~Andre Gide