The fake door or 404 page test is a good way to validate demand for a new feature that you are considering building. The idea is to include a link or button for the new feature and see what percentage of customers click on it. This lets you gauge whether customers actually want the feature before you spend the resources to build it. Since you haven't built the feature yet, the customers usually see a page thanking them for their interest and explaining that the feature is not built yet when they click on the link or button. You can also add a form asking the customer to share why they would
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