Discover This Week’s FREE Samples. Freeosk is offering FREE Mr. Clean Magic Eraser, Thinful Sea Salt Caramel & Member’s Mark Better Nut Bar at Sam’s Club locations from 03/03/2023 through 03/09/2023. If you want to get this freebie, click on the “Get FREE” button, find a location near you and head out to the store. Download the Freeosk app for Android or iPhone so you can redeem the samples at the Freeosk location.