You do not have use an xml file or xml integration in order to list products in virtual marketplace. StockMount users can do both upload the products manually and use Excel integration.
Users who will prefer using Excel integration, they have to publish their excel files, which contain the product information and has certain format, over the web and has to add them to StockMount product sources. In case data storage is needed for uploading the excel files for excel integration, it can be purchased from StockMount in-app.
The important thing in Excel integration is that the information on the excel file that will be used has to be up to date. Excel integration is just like xml integration, it enables users to upload their products from one source. Source files that are uploaded to the system with Excel integration can be used in xml publishing wizard and can be given to outside sites for xml integration.