Offer is through their facebook page:
It's really annoying to find this free sample offer on their facebook page. If you want to take part in this freebie, make sure you disable your adblocker for facebook temporarily as that's only way, the offers will show. Also, there's no direct link to the free sample. But you click on the link posted above and scroll about 3/4 way down or until you see the picture that I have attached.