It won't be signed off. Tf signature is actually placed on the shelf of testflight, which is Apple's official distribution channel, so it is extremely stable and will not be cancelled.

People who know tf signature may have heard that tf signature is valid for 3 months. In fact, the download link of tf signature application is valid for 3 months. The download link must be changed after the expiration, but it will not affect the users who have downloaded it. As long as the service of the app itself is not stopped, the downloaded user can continue to use it. New users can download through the new download link.

Micro-diversion can be done, and now there is tf signature discount during the event, which is very cost-effective