The only thing left is for Fentgao to either address the issue openly which I personally don't expect to happen since he's generally very quiet from what I've seen or the license can be changed appropriately and the necessary changes made.
The problem is - he can't, as he has to release the complete source code of DVD Fab Platinum under GPL (make it open source).
This is the point everybody seems to ignore: even if you only use a tiny piece of GPL code, the entire program (derived work) must be released under GPL, meaning open source. This is even true, if you only use a library published under GPL. If you use a GPL library, the executable must be released under GPL as well.
I don't think he wants that.
From a legal point of view, only the copyright holder can pursue copyright violations. This means, (one of) the authors of the code used can force Fengtao / VSO / whoever... to follow the rules outlined in the GPL.
Some authors have done this a few times successfully, even against large companies like D-Link and LinkSys.
More information can be found here:
http://www.gpl-violations.org/
An extract from this site:
Goals of gpl-violations.org
The goals are:
Raise public awareness of the infringing use of free software, and thus putting pressure on the infringers.
Give users who detect or assume GPL-licensed software is being misused a way to report them to the copyright holders. This is the first step in enabling the copyright holders to push for license compliance.
Assist copyright holders in any action against GPL infringing organizations.
Distribute information on how a commercial entity using GPL licensed software in their products can comply with the license.