<i>I sent a short list of questions to 1222 recipients.</i><p>Great!<p><i>The open rate of the email was 45,8%</i><p>That&#x27;s excellent.<p><i>...and 27 people replied.</i><p>Oh. Oh dear.<p><i>~ 96% of respondents told that they would - or already have - recommended the tool for a friend or colleague.</i><p>96% of the people who are enthusiastic enough about the service to respond to an email would recommend the service, but the 97.8% of people didn&#x27;t respond is <i>by far</i> the more important number. If the people who&#x27;d tried the app were a random sample of the population then 2.2% might be enough to suggest there&#x27;s a valid premium business model there, but the people who tried the service weren&#x27;t randomly selected - they were a self-selected group of people who are interested enough in user testing to sign up for the service. If you can&#x27;t get a significant response from a group who are (alledgedly) interested in your type of product then you clearly have a <i>big</i> messaging problem.