It all depends. All images are reviewed by a Curator before they are approved for sales on our platform, and at times we have large numbers of images pending review. If you submit your images already encoded with XMP / IPTC data, they can be approved within 72 hours or less. If you submit images without providing the metadata, it can take much longer for us to manually add this information.
Read more: How do I encode IPTC / XMP metadata into my files?