How do i import email addresses into WordPress.com subscriptions? [closed]

WordPress.com Jetpack subscriptions are not hosted on your site, they’re hosted on the WordPress.com servers. So you can’t add directly to the database.

However, if you take a look at the Jetpack plugin code, it outlines the XML-RPC calls used to interface with WordPress.com and add subscribers. So you could build your own importer …

// Some kind of function that parses your CSV file into an array of email addresses
$subscribers = get_subscribers_from_csv(); 

foreach( $subscribers as $email) {
    Jetpack_Subscriptions::subscribe( $email );
}