I did a deal similiar to this last year and it was how I built up my butter stockpile!
Land O’Lakes has a great “rebate” form  available right now. When you purchase any Land O Lakes buttery spread you can send in this rebate form and they will send you a coupon for a FREE container of Land O’Lakes Olive Oil spread.
This deal is valid through 2/29/12.
I would print the rebate form now if you are interested- often times they will pull them before the deadline.
Thanks For The Mommas !