I have question about the Xbox live gold offer

You need to pay the full amount. The 3.33 value is just a breakdown of savings if you divide the total amount to the number of months of Xbox Live Gold that you are getting.

I found this, I think it answers your question: Is this only for new members?

Games with Gold is available to all Xbox Live Gold members. To download free games you just need to be an Xbox Live Gold member at the time of redemption of any Games with Gold offering.

Also, some Gold special offers and trial Gold accounts may not show up on Xbox Rewards -
http://rewards.xbox.com/faq/

Under ABOUT there is the question "My Xbox LIVE Rewards account says that I'm a Free member, but I don't think I am. What should I do?" with information.

Hey there -

You can check out this page for information regarding
Xbox Live subscriptions, including Gold offers.

Let us know if you have further questions.

Hi there Cesar,

Thanks for the reply. I'm sorry to hear about the issue you may be having with games with gold. The first recommendation is to

log into your Microsoft account to double check your Xbox Gold Subscription active. If the subscription is active, when you try to access Games with Gold, make sure you're using the gamertag that has the Xbox Live Gold subscription. If you redeemed a promotional
Xbox Live Gold token as part of your subscription, you won't be eligible for Games with Gold. If you used a prepaid code to sign up for Xbox Live Gold, make sure it was successfully redeemed. The Games with Gold are only available with the Xbox Live Gold Subscription.

If you live in one of the countries or regions listed above under "Offer and eligibility" and still can't access Games with Gold, contact Xbox Support.

Please take a look at the following article :
Games with Gold. Games with Gold offers free Xbox games to qualifying Xbox Live Gold members. This article answers frequently asked questions about the Games with Gold program.

Hope this helps. Let us know.