Part of the problem with the Vine program is that there&#x27;s no real need or want that other reviewers have. If I&#x27;m looking for a backup battery because it&#x27;s something I need every day, and I get shipped one and it takes two weeks and then it doesn&#x27;t work consistently (something that happened to me), then I&#x27;m going to have a review that says that. If I&#x27;m a Vine reviewer and a backup battery shows up and I use it a few times and it works fine, I&#x27;ll probably leave a positive review and then set the item aside. The lack of need or want completely taints the review process<p>The other issue is that psychology studies show that being given something ingratiates a person to the giver, which also greatly taints the Vine program.