Are implicit dual-licensing agreements inherently anti-open?

[David Barrett]

Wilson, Andrew wrote:
> Alex Bligh wrote:

> in which the ID
> is granted what is effectively right of first refusal to any
> modifications.

Could you explain further what you mean by "right of first refusal"?  I 
don't see how the OVPL grants the ID rights to refuse anything.  Indeed, 
anyone who contributes under the OVPL can:

1) Use the modifications
2) Redistribute the modifications
3) Have other people modify the modifications

In what way does the OVPL enable the ID to refuse modifications in any 
way?  (Other than refuse to personally use or redistribute them, which 
is no different than anyone else.)

-david