Craig,
I understand thoroughly your point, I don't make the rules but I can pass your suggestion to the persons who decide this, I certainly believe that making it by this way we can keep track of our potential customers and you can have a more eficient control on crackers of the software. Also by using the Evaluation version you agree to use it about 30 days I believe, I don't have that number in my head right now so after that we can try to contact this persons and see if they like or not, why, do they need the complete version, so they need support in their application..etc, but anyway, I'll pass your suggestion and see what is the answer for that.
Thanks for your comment...
Nestor Sanchez
Applications Engineer
National Instruments
Nestor