I've received an email from Adobe to say:
Welcome to the Adobe ExportPDF online service. Because you signed in using your Adobe account, you qualify for one free trial conversion. Simply upload a PDF file to convert it to a Word document in DOCX format.
Where do I go to trial the product? I can't find a link to upload a trial PDF anywhere on the site.
Our Adobe ExportPDF service does not support free trial conversions at this time. We have identified an issue in which some of our users are receiving emails advertising free trial conversions. We apologize for this and we are in the process of correcting it.