I want Vgcharts to add that multiplier on sales. For PS4 and Xbox games at least.
The ratio on digital sales can vary just as much as the COMG ratio, so just putting a multiplier would very much falsify the results.
So yeah, until platform holders (which includes Steam, GOG and so on on PC) start sharing that data, I'd say we leave them out
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/