I agree that building in-house integrations is superior to relying on a 3rd party - it's always better for the end user when their sensitive information doesn't have to jump between multiple companies. However, by their own admission (https://support.stripe.com/questions/what-is-the-relationshi...), Stripe did not build any scraping integrations in-house. They in fact, do rely on third parties.

According to one of their PMs, Edwin, elsewhere in this thread, they supposedly integrate directly with banks that already have existing APIs - but for the 95% of banks that don't, it appears this product is just a wrapper for existing aggregators MX and Fincity.