NexTag

Buyer Surveys: https://merchants.nextag.com/serv/main/seller/help/ImplementBuyerSurveys.jsp

ROI Optimizer: https://merchants.nextag.com/serv/main/seller/help/ImplementSalesTracking.jsp

Shopping.com

Store Surveys: https://merchant.shopping.com/mac/app?service=page/AddSurveys

ROI Tracker: https://merchant.shopping.com/mac/app?service=page/AddRoiTracker

Shopzilla

Store Surveys: https://merchant.shopzilla.com/pp/ratings_research/survey_code.xpml

ROI Tracker: https://merchant.shopzilla.com/pp/product_inventory/roi_tracker.xpml