How is it a lot of effort? It can easily take a minute to write 100 words review + 30secs to read the overview of the product., it's so simple.
I have a feeling that you are also the one who posted in DP and tried your luck in NB to get referrals?
This is the same scheme as ComparedBy.Us and Ciao, which I think are now "dead"? Is it possible that this might be "dead" someday?