On their website[1] they make no claim of being a bank. The text only speaks about being a "regulated financial institution" and the footer states "unbank" and "no bank". Their terms of use[2] clearly state that they are only a credit broker, don't loan themselves, and are not party of the loan contract. This is not banking and I'm not sure why Reuters uses that word so much. They don't even mention once that this company is not the lender and heavily imply they are.
[0]: in the database of the German Federal Financial Supervisory Authority: https://portal.mvp.bafin.de/database/InstInfo/institutDetail...