Why is it astounding? They have one of the biggest e-commerce applications in the world. A mobile app for shoppers. A payment system and mobile wallet app. A shipment tracking system. Tax and small business software. They have their own lending arm with its own software. They have multiple frameworks for other development teams to make super customizable e-commerce sites. They support Remix and Tailwind among other software. They have brick and mortar POS systems.

They are like multiple companies in one: Square, Etsy, aspects of Stripe, aspects of Squarespace/Wordpress. Idk I can see why they have a lot of people.