When we collect a set of AggData, we are confident that it is 100% complete and accurate, as far as the source is complete and accurate. We simply use tools to extract data already available on the web, so we can only guarantee as much accuracy and completeness as the source provides. That said, we are very particular about making sure our sources are as official and as original as possible. For example, when getting listings for a retailer, such as Walmart, we go to that retailer's website (www.walmart.com) to collect information, and not some third-party business listing site.