Fuwanovel is a volunteer site. Introduce payment processing, licensing, distribution servers, etc etc etc, the costs would be unreal. There is zero need to do this when other sites already do this and do it better than fuwanovel can do.A
Bear in mind, that the powers at be on this site are mostly in a status quo mode due to many real life issues. At the very best, Fuwanovel could provide links to other places to buy VNs, which VNTS already does. As far as EVNs are concerned, there was a project in the works similar to VNTS for EVNs but the sheer amount of work that would be required for it was overwhelming for me.
So to get this done, you need some good investment for start up, and you need an actual paid staff that can at the very least work part time for the site. Then the infrastructure of the site itself would need a massive upgrade. It'd just be silly to do this.