zlacker

>I believe many developers integrate with Stripe expecting that their JS library executes and shares data only on the pages where Stripe UI elements appear on the page. The fact that JS library runs on every page and sends data back to Stripe, even before the app calls the API, is unexpected.

It's not unexpected when they tell you to include it on every page:

As was in their docs ages ago and still now: https://stripe.com/docs/js

>Including Stripe.js >Include the Stripe.js script on each page of your site—it should always be loaded directly from https://js.stripe.com, rather than included in a bundle or hosted yourself.

>To best leverage Stripe’s advanced fraud functionality, include this script on every page, not just the checkout page. This allows Stripe to detect anomalous behavior that may be indicative of fraud as customers browse your website.

... they are asking you to enable them to track your user's interaction with your entire website.