Regardless of the technology that we have now, either data cleansing or data enrichment remains a tedious task, but one that keeps your company standing firm on solid ground. It comes as no surprise, therefore, that many companies resort to outsourcing to make sure that critical data-related processes continue to run smoothly.
You may be using powerful software for data analysis or running your own algorithms, but remember that they can only give answers based on the quality of data entered. And, you can only get quality raw data through high-volume collection methods done by humans connecting with your customers and interacting with them in a meaningful way. As of now, humans remain the cheapest, most accessible, and most reliable tools for that.