Watch out for free ELF hydrating drops samples being advertised on Facebook. This is a good way to show Facebook you enjoy free makeup. To make sure you see this ad: follow their page, like their first few posts or comment on them. Then come back into the app and hopefully it will appear as an advertisement in your feed. They'll ask for your name, address, and email to apply. Let me know if it works! If it doesn’t show up, try adjusting your ad preferences, engaging more with their content, or checking regularly for it.