I'm not sure if they continued to do this but if they did you would have gold membership as long as you haven't made any other gold accounts on your console you will receive 1 month of gold on that account. But im not sure if this still works.
Did this solve your problem?
Sorry this didn't help.
Great! Thanks for marking this as the answer.
How satisfied are you with this reply?
Thanks for your feedback, it helps us improve the site.