Yes, I think people already included in the VRCT are aware of that otherwise they wouldn't be so concerned, like I am, about what's going on and the way that the process is evolving. If you read the reams of stuff I've trotted out in support of the VRCT and regulation you will see that.
Actually; I think it's one of the VRCT comittee members themselves who raised the issue of "secret agendas" in response to a concern. I don't think this was a coherent response from an organisation trying to gain/retain support. Incidentally my concern was raised because of what I have read, from a diverse range of sources, in the "public domain".
Read for "ulterior motive" in my initial posting "a further or additional motive". Ulterior does not have to mean "secret agenda" as far as I'm aware.