Which feature is NOT aimed at increasing authorization rates on Stripe?

The feature aimed at increasing authorization rates on Stripe focuses on optimizing transaction approvals and ensuring that payments go through successfully. In this context, the option related to "Minimal User Network" does not pertain to the strategies designed specifically for boosting authorization rates.

Smart Retries enhance the chances of payment approval by automatically resubmitting declined transactions after a set period. This is particularly useful as some declines may be temporary, and giving transactions another chance can lead to success.

Network Tokens are designed to securely tokenize card data, which also facilitates better authorizations by ensuring payments are processed with up-to-date information and reducing friction at the point of sale.

The Card Account Updater automatically updates card information for customers whose cards might expire or change, ensuring that merchants have the most accurate payment information, which ultimately leads to higher authorization rates.

In contrast, "Minimal User Network" does not contribute to improving payment authorization and is not a recognized feature in Stripe's suite aimed at enhancing transaction success.