Author here. Happy to answer any questions or hear feedback about this post.
replies(4):
> This is a common practice for anti-fraud detection systems... You will see similar techniques used all over the web (your bank website, Ticketmaster, airlines websites, etc.).
I respectfully disagree.
My bank tracks my movement on their own website. They don't track movement on other businesses' websites.
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. I believe that Stripe should, at the very least, make this more obvious to integrators and, ideally, give site owners the ability to limit what data Stripe collects.
Given your background I'd imagine you'd be aware of this.
Heck, I have a friend who's working on a non-finance web app with <20k MRR, and even at that size he's starting to encounter fraud problems that require tooling to mitigate.
If your app stores any data that may be sellable on the dark web, you are a target.