I have just published a new post on incentivizing revies at the GetFiveStars* blog: Review Incentives? Are the Benefits Worth the Cost?
Reviews and testimonials are powerful social proof of your business’s capabilities but they are often hard to get. Incentives, including contests and discount coupons as well as direct rewards, often will increase your review counts. But at what cost?
*Full disclosure: I am a founder and co-owner of GetFiveStars.comReview Incentives - Are the Costs Worth It? by Mike Blumenthal