Conversion rate is the percentage of visitors who make a purchase after clicking an affiliate link. Affiliates rely on this number to know if a product is worth promoting. Yet, some merchants choose not to show the true rate, or they display only a general figure. This could be because the conversion rate is lower than affiliates expect, or because it changes depending on traffic quality, region, or device. By hiding the real data, merchants might attract more affiliates without revealing possible risks. However, this lack of transparency can hurt trust and make affiliates waste time on offers that do not perform well. Should merchants be more open with real numbers, or is it reasonable for them to keep some data private to protect business strategy?