Second Thoughts: Sheep 'Dance on Eggshells':
"Now Satchmo delivered the real story: that in his/ESC's interpretation, if Linden Lab had a dual license under GPL with their OS code for the viewer, which they released both as an OP code and, as he claimed, still claimed the right to sell it as a proprietary item (and they must have gotten some payoff, too, when they licensed the Sheep to have a 'commercial use viewer), then by analogy or by precedent, the Sheep, too, could turn the open into the closed."
Hard as this paragraph is to parse ("word salad", indeed), it's pretty clear that Prokofy doesn't understand the concept of dual licensing.