Most banks provide most services at loss and make most of their money on mortgages. So they will provide payment services in the hope that 20 years later you get a mortgage from the bank you are familiar with.

Notice also that the whole business model relies on the bank having privileged access to central bank money and sharing that access with the plebs for some percentage interest. However current technology makes it feasible for central banks to simply interact with consumers directly. The only remaining problem is how to decide who is likely to pay back the loan. Retail banks could be relegated to credit check providers.