Evodia Buy 1 Item Get One Free, from Their Website,

I received a postcard from Evodia today. Until 31/12/2012, you can get 2 for 1 for items on their website.
Lower priced item free
not valid on sale items
not valid with other offers

In Oz, you get free shipping over $25. I assume that isn't an offer but a term of sale.

Here is what you are supposed to do:
Add products you want to BUY to your cart.
Do not add the item you want free to your cart.
proceed to checkout
enter promo code "evdia2012"
In the MESSAGE section at the base of the screen write the name of the product(s) you would like for free. Do not add the free product to your shopping cart otherwise you will be charged for that item.

The card boldly states "Buy any product from the evodia website and receive a second item of your choice* FREE"

While the Ts&Cs tell you to add the product(s) you would like for free in the message section, everything else refers to a single item for free. I'd assume you can get one item and one item only for free. Per account.

I am not familiar with these products and don't endorse them in any way. Unless you already love these products or are buying them for someone who does, I reckon, why bother.