Maybe you guys didn't catch this but I would not be too quick to enter than 12 month card just yet...
First item on the list: Renew 1 Month XBL subscription 400 pts.
Notice how it's NOT in the section for "one time only" instead it's in the Recurring Activities.
I read that as MS is going to give me 400 pts EACH month that I renew. At the cost of Points your XBL gold membership would be FREE as they return the value to you each month.
Use them for Games on Demand, XBLA, Zune Marketplace or the regular Games Marketplace.
Sure they give you 400 pts for renewing your 12 month card too - but you only do that once a year (normally)...
I think it's time to go Monthly boys and girls...