This is a textbook example of the power of platforms; consider an operating system like Windows: any number of applications can run on any number of computers thanks to there being an abstraction layer in the middle:
Now with Treasury, someone starting up a new Internet business can simply start selling goods, services, or yes, subscriptions, and have their banking needs met by the same software which is powering their business.
Financial services simply weren’t designed for the modern internet, and this is a pain point for businesses today: nearly half (46%) of companies report that their banking experience has hindered their company growth.