Did you know that you can earn $20-$40 at time just for lying? According to this Craigslist ad, a New York business owner desperate for positive reviews on Yelp, an online yellow pages couples with user reviews, is shelling out for shills.

It reads: "I have a business that is currently on Yelp. Although we're somewhat visible, we could really use a few more awesome reviews.
We're located in New York City and would love to have a stronger presence on Yelp.
If you're an active member on Yelp and looking to make some money - please contact ASAP!

Location: New York, New York
it's NOT ok to contact this poster with services or other commercial interests
Compensation: $20.00 to $40.00 a review!"

Just another reason to take online user reviews with a grain of salt, and if you do use them, aggregate the overall signal from multiple reviewers across multiple sites.

Need Positive Reviews on Yelp! (New York, New York) [Craigslist]