Explanation...
Apple Employees are not allowed to divulge privileged information, but can talk about happenings.
They get one 25% discount (personal use) and three 15% discount (friends and family) per calendar year, but the products must be ordered via the company website.
10% discounts are allowed for in-store items for personal use of family and friends, there is no real limit but I know of no one whom has tested it.
No, Apple employees earn no commission, they just want to sell you the best stuff. It is quite frustrating for both employees and customers when a customer brings in a two year old computer to be repaired, and then find out it costs more than Applecare would have been to fix.