I think you captured the most likely reason for slow growth well: "the growth strategy pivoted to target larger existing fintechs, banks, platforms, etc".
Selling into banks and larger enterprises vs. FinTechs is day and night. FinTechs are not as regulated and have smaller orgs so the sales cycle is much shorter. Selling into banks is 18+ months at a minimum. Layer on top of that longer implementation times... it could take 3 years until you see revenue.
I think you captured the most likely reason for slow growth well: "the growth strategy pivoted to target larger existing fintechs, banks, platforms, etc".
Selling into banks and larger enterprises vs. FinTechs is day and night. FinTechs are not as regulated and have smaller orgs so the sales cycle is much shorter. Selling into banks is 18+ months at a minimum. Layer on top of that longer implementation times... it could take 3 years until you see revenue.