Smashbox is offering free samples of its face primers in the mail. Choose the primer sample of your choice out of 4 offered: Correct, Primerizer+, Illuminate & Control. You can pick This is for select Facebook accounts. Try liking their Facebook page and their website. Then keep an eye for the offer in your Facebook or Instagram newsfeed (see below a screenshot of the post to look for). You might see the offer right away or in a few hours or days.