Data-driven works well for cheap services with many customers. Try it with expensive services with few customers and your experiment quickly becomes statistical

Data-driven works well for cheap services with many customers. Try it with expensive services with few customers and your experiment quickly becomes statistically worthless and expensive. Also, data-driven does never work for a product. If you sell a product, your customers do not want to be monitored. They also do not want to randomly get an inferior version of the very product they paid for just to satisfy your research goal. So your only realistic test case would be to offer a second product and see how it sells. Or to pay for expensive surveys.