[quote name='needler420']I assumed based on the FAQS you would get multiples and it wouldn't stack.
Q. Can I give my reward as a gift? A: You can give your RewardSurvey selections as gifts simply by inputting the name and address of the person you would like to receive it on the Delivery Information page. What I did every time was use a different name under the same address. For some of names I used double.
It hasn't been long enough for me to find out if they give multiples or if it stacks your sub. I don't get where you see account info to see if it stacks or not.[/QUOTE]
In my general experience from various magazines, is that the subscription is a renewal (stack) if ALL the information is identical. If there is a difference such as the name or addition (or subtraction) of a company name then it will be a new subscription, and you will receive duplicates.
Most magazines, if you contact them, will change the duplicate subscription into a renewal if you explain that it should have been a renewal. I've gotten a response along the lines of yes we see that the same name at the same address is getting two subscriptions we will add the full years worth to the one subscription and you may receive one more duplicate.