CrisBCTSuppose we continue to give e-junkie a pdf file rather than a zip. Along with the name to zip the file into when the pdf stamping has been added...
The problem is the requirement to stamp a whole collection of separate PDF files that would be issued as a single product together, and we have no way for sellers to upload multiple files for a single product in the first place, other than compressing them into a single .zip that is simply issued to buyers as-is. The PDF Stamper currently won't even work with "package deal" bundles using the "Package files from other products" feature; it can only stamp a single PDF file that is uploaded for the exact product configured with the PDF Stamper URL.