Stripe has a Get started button. You click it, fill out a form, get your site approved in maybe a day, and start making money.
Adyen has a Talk to our team button. You close the tab and never think about it again until you’re making serious money.
---
Edit: that is, of course, by design. Adyen doesn’t want small businesses. From the sibling comment:
> only able to support businesses currently transacting more than €5M per year