Re: Vine reviewers (recipient of a free product): whenever I see only their reviews on a product, always 5 stars even on the most garbage chinese-made ones, I know what to avoid.

To me, seeing their review is an indication of terrible product that decided to pay off some easily corruptible reviewers that give away 5 stars just to keep receiving free stuff.

I understand your explanation, but as a user, established brands don't have to pay off reviewers at all.