You don’t 🙂 Its only feature is designed for people who have an extensive database and have daily sending limitations due to their version selected and the limited number of channels included in their package.
Hence, allowing them to target the most active WhatsApp users first. Instead of running a mass marketing campaign for all active WhatsApp numbers.
Last seen filtered numbers are most responsive since they are mostly online all the time on WhatsApp.
Unlike users who have not been active for more than 48 hours and most likely are inactive WhatsApp users because they may be the user changed their WhatsApp number but still kept their old WhatsApp number activated WhatsApp.