Starting February 19th, users of the Instapaper app will need a Premium subscription to access the "Send to Kindle" feature, a service that has been free for many years. The subscription costs $5.99 monthly or $59.99 annually. Instapaper's decision comes after a significant rise in operational costs associated with generating Kindle digests for over 100,000 users.
Previously, users could send web articles to their Kindle eReaders via both Instapaper and Pocket, the latter of which was discontinued by Mozilla last year. While Instapaper's feature will now incur charges, the same functionality is still available for Kobo eReaders at no cost, as it is less resource-intensive.
Despite the changes, Kindle users still have alternative methods to transfer content. Each Kindle device has its own email address, allowing users to send various formats, including HTML and PDF, directly to their devices.