Platforms like Stripe where anyone can sign up at any time drive up prices because the amount of low-profit companies needs to be offset by the companies making more. Great for small startups but a bad deal for major companies.
Stripe has also been criticised for forcing growing companies into enterprise plans the moment they hit certain growth numbers. That's one way to keep the business profitable, but it's not necessary if you only take on businesses that are already profitable enough dedicate a sales team onto.