Which strategy is recommended to encourage as many site visitors as possible to share their email?

Using a single sign-on (SSO) tool like Google or Facebook Connect simplifies the process for users, making them more likely to share their email. It removes the friction of creating a new account and remembering another password, leveraging trust in established platforms. Including an email collection pop-up can be effective, but if not implemented carefully, it can also be intrusive and lead to a negative user experience, potentially deterring users. Prioritizing more discounts through email is a retention strategy for existing subscribers, not a primary method for initially collecting emails from site visitors.