I disagree! Yes, it may be the customers who ask if they can get a new promotion, but its the retailer who makes the desicion to flip the account and do the installation.
You need to actually work the system everyday to know what im taking about, an existing customer trying to establish new service is going to set off so many warning messages in the system, its almost impossible to sign them up without knowing they are a flipped account.
Even if the customer still did "Make" it through the system and everything looked like a new customer, there is still going to be evidence of a previous installation when the installer shows up at the customers house. Its like I always tell my installers, if you see a DISH Network Dish on the house, call the office....
Now granted there is some that are going to fall through the cracks, especially customers who had an old account from years ago. If a customer has an account now, there is no way you can build a new account without doing some major address manipulation!