Sure, the point system encourages the same sincerity of paid reviews of books sold on Amazon or of merchandise sold anywhere over the internet. If the point system exists to encourage reviews, and I am sure it does, why is there otherwise not a genuine review process, on style and substance, and not so much on grammar and punctuation, only for the sake of reviewing, among disinterested strangers who have nothing to get or give, on TNBW? It ought to be simple: find a book that has something which interests you and comment on it to the extent it satisfies or disappoints, and why. But no, everyone either wants to suck up and "make friends" or get reciprocal reviews of the junk they write for the junk they read.
Seriously. This is the same drivel I listened to when the site originally launched and it proved to be totally worthless. That's my review of your comment.
If it is so obvious to you that so many reviews, not driven by the rewards of the point system but rather from honest effort to help, are sincere and productive, give me two examples. On the other hand, if it is your assertion that so few can be driven by other than the point system, why is that?