How can you launch a new product if you can't run an experiment? Or how can you adapt a metric so you can run an experiment?
Example in this link: https://hbr.org/2018/11/using-experiments-to-launch-new-products
Uber wanted to launch Express Pool, so they do the tipical A/B testing and compare metrics ,but in this case they have metrics to compare before and after launching the product (revenue per user, avg trips per users, etc.)
But what if this is a complete new product? Example: Uber trying to launch a Wallet?
If I don't have a counterfactual, what can I do?