Email verification programmatically
You could use hook_mail_alter to abort the verification email being sent in the condition that the user is using the premium option. As stated on the api.drupal.org page if you set the 'send' parameter of the $message data to FALSE it will abort sending the email.

You'll need to retrieve the 'premium' context within your implementation of hook_mail_alter() to achieve this, which may require setting that property on the user, the session, or in a custom database table.