There's a new sponsored ad on Facebook for a FREE Sample of Acidic Bonding Concentrate Shampoo and Conditioner from Redken (see screenshot below). There is no direct link since this is for targeted accounts. If you don't see the offer pop up in your newsfeed immediately after checking their page, try these suggestions. Like Redken on Facebook and/or follow @redken on Instagram then like 3-4 of their posts. Do a Google search for the product and scroll through the results page. Close everything out. Browse your Facebook/ Instagram newsfeed and watch for the ad to possibly show up in a few hours or days.
The ad will look like this or similar.