I presume that a number of the resellers are selling the same juice formula, purchased from the producing factory.  We know that at least some manufacturers state on the label that their juice is made directly from ripe, fresh berries.  However, it should be determined, and stated in the article, how exactly this juice is made.  My guess is that the 90+% of the product comprises juices other fruits and berries, and the wolfberry component is in fact the wolfberry powder or other extract you mention.