Questions are as follows:
If your product has been sold out, but a lot of users (possibly thousands on ten thousand), how do you deal with your code to achieve as much as possible to meet the needs of different customers, but it will not take any improper procedures?
For example, the source code is divided into ten thousand on thousands of copies, each corresponding to a client, when the modification of a customer's requirements, go find the source code to modify a method .. This is another way .. the source code are only a synthesis of different needs of customers are there changes ..
Above two methods are not sure, then ask your commercial software development programmers how to deal with this situation?