Scroll down until you see the offer post (it may need to load a few pages before you see it). Then click the “Sign Up” button in the Facebook post (if you can’t see it on mobile try requesting a desktop site or the deal might just be over). Enter your shipping information and hit “Submit”. That’s it, just wait for your free sample! Having trouble with your zip code submitting? Try changing the country to Canada, then back to USA then enter it again to see if that fixes it, it usually does.