“Now that we have enough banks, and they’re all working across a common open banking style API that looks the same for all our banks — to our bigger fintechs it looks like one giant network of banks. At some point, we got enough banks here that we could attract more fintechs, and that really started this virtuous cycle. As we had more fintechs, it became easier to add more banks.”

https://techcrunch.com/2023/02/01/proving-that-banking-as-a-service-is-hotter-than-ever-treasury-prime-raises-40m-series-c/