I've done the Ameritrade offer twice. Once for me and once for my spouse. I just spoke to Ameritrade and asked whether I could open another account such as a joint account or an account for one of my children. The Ameritrade rep. said that I could open the account, but that I would only get SPG points if I gave them a DIFFERENT SPG number than I gave them for the prior accounts. Is this true? Is this a change?