Software is expensive, especially high end simulation tools. If the software can not be fully utilized it is just not worth to pay the prize. One other problem is the software usability. Todays software is so complex, that one needs to use it on a daily basis to get a solid understanding how to use it successfully. If it is used only occasionally it takes too long time to learn every time how to use it. EyeKnowHow is "power user" of ADS. Therefore all tricks in usage and programming are known and applied many times!