I see that users can upload their software for free, ( https://upload.cnet.com/2706-21_5-973-4.html?tag=rb_content;contentBody ), but CNET's Download.com does not handle financial transactions for any software that has to be purchased.
However, look at that page's guidance about Buy Now links
If accepted by Upload.com, then Download.com will display your software with the licensing details you have provided, but they do not sell software. For that the potential user has to visit your own web site and purchase the software via whatever method you have selected.
Can I get paid for my products via Paypal with a free listing or do I need a Premium listing??