I use this workaround to get the ID of the owner of the current blog:
$thisblog = $current_blog->blog_id;
$mail = get_blog_option($thisblog, 'admin_email');
$user_from_email = get_user_by('email', $mail);
$user_id = $user_from_email->ID;
I use this workaround to get the ID of the owner of the current blog:
$thisblog = $current_blog->blog_id;
$mail = get_blog_option($thisblog, 'admin_email');
$user_from_email = get_user_by('email', $mail);
$user_id = $user_from_email->ID;