Since we introduced the new voting algorithm and fivestar's default logic, some users lets call them "ShitForBrainDon'TThinkBeforeActing" just because that's less characters to type (and I don't plan to over-type the subject) than the actual insult I have in mind for them, started voting (or downvoting) suppliers they according to their comment history have absolutely no experience with.

Hence the new thing - you need to write a review first only then you can play with the stars.