Did you also cite the part where you are being financially supported by Bertelsmann Stiftung who have a competing product (Arvato Infoscore)? Though I am not sure if it is as bad as they claim...
a. is disclosed by our partner algorithmwatch
b. the funding is not for this project
c. see https://twitter.com/OpenSchufa/status/964408780162150400
"Die SCHUFA ist die bekannteste Auskunftei & Marktführer; wir fordern in unserer Projektbeschreibung u.a.: "Die SCHUFA & andere Auskunfteien müssen öffentlich & permanent darlegen, wie ihr Score funktioniert bzw. welche Modelle/Annahmen ihm zu Grunde liegen (Nachvollziehbarkeit)"
d. read https://okfn.de/blog/2018/02/openschufa-english/#update (we already requesting infoscore Consumer Data GmbH data)
c. "The SCHUFA is the best known credit reporter & market leader. In our project description we ask: The SCHUFA & other credit bureaus must publicly and permanently explain how their score works and which models / assumptions are based on it (traceability)"
Infoscore is a <censored> company. They have a debt collection and a rating arm which are officially independent.
They also have a legal arm (Haas & Partner) in the same building (again "independent"), who collect legal fees on top of Infoscore's debt collection fees -- a practice that has been deemed illegal by several federal courts.
The legal arm is largely automated, so the "lawyer" fees are questionable.
Good luck convincing Germans to surrender their data. I would be very surprised seeing this working out.
Also, you will get data from a very skewed demographic.
AFAIR there is an upcoming EU law which requires (at least some) transparency on how scores are evaluated, in expectation of algorithms making life changing decisions. We'll see how that's panning out.
EDIT: to clarify, I'd love to see this working out. But I never would give data of this kind to an unknown organization.