It’s more likely someone inexperienced used the internet archive to recover something they deleted by accident - I assume Barkley’s uses some form of source versioning, as banks are usually a mess but not to the point of not storing their code properly, so we can exclude someone with any real experience. The question would then be how it got to production. Again, banks are a mess but regulations around software that handles anything related to money demand that changes to production be peer reviewed.