Right, it can't force them to release an internal build. But that's not what this is, it's an external beta. At this point they could still back out from releas

Right, it can't force them to release an internal build. But that's not what this is, it's an external beta. At this point they could still back out from releasing the source code if they wished, but not if they had used the GPL. If they had used a GPL program, they would at this point have to sacrifice a great deal of work to avoid releasing the source. That is my point. The GPL can force you to plan for things that you have no way of knowing about (For example, are we going to have to modify this program to couple with our internal APIs at a level that we don't want documented? Is the source code going to be ugly to an extent that it would be embarrassing to us to release it? etc.).