Premium NST is a subscriber communication service published by Nightstricker Inc. It helps publishers, magazines, and paid newsletter services send essential emails to people who pay for their content. Messages cover key moments in the subscriber journey: welcome emails with access details and subscription-management guidance; notices when a new issue or edition is available, optionally with a table of contents; advance reminders before automatic renewals, including the price, date, and a one-click cancellation option; and payment receipts or factual notices about failed charges.

Premium NST focuses on active subscribers and people whose subscriptions have just ended. It excludes people who tried a free trial but did not convert unless they requested news. The service emphasizes advance notice of renewals, straightforward cancellation, and one cancellation confirmation followed by no further messages. It also states that subscriber lists remain with the publisher and are not rented, exchanged, or shared with other titles. Premium NST offers contact for publishers, readers with questions about messages, and blocklist operators, prioritizing reports of unwanted email.