I think that problem is mitigated by Amazon&#x27;s algorithm matching you with things that are more likely for you to either really like or use on a regular basis, which leads to updated reviews. I&#x27;ve had some 5 star Vine reviews turn into 1 or 3 star ones after 2-3 months... and even some reverting back to 4-5 stars after a year or so.<p>&gt; 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.<p>I agree with this. Another problem which the author mentioned is the lack of a review standard. One person&#x27;s 5 star rating is not equivalent to another person&#x27;s.