Because the AMBE chip is the Best sounding, anyone can buy one for $25 in qty=1, so its not a hidden thing only the huge radio goods can buy. Several folks have built multi-mode USB sticks with them. The free codecs just don't work as good and why the commercial radio companies buy the AMBE chip as well. You do know the Transistor was a proprietary part of AT&T, and Sony had to buy rights to make them for the first transistor radios. By the time we are about to die the AMBEs and their clones will be like transistors today and hams will be upset about the Proprietary Sub-Space radio chip and they wont do ham radio over the solar system because you have to pay someone $25 for a special chip to do so... Ha !