Not my understanding that it was low demand that led to the demise of the Green Gear ti beam bikes. They are quite popular with those who own one, including me, which is why I traded up from an Air Friday to an Air Glide.
I remember being at a Green Gear event in Eugene about 15 years ago, and Hanz stunned the crowd by showing off his new Air tandem, which he then proceeded to disassemble into two normal size suitcases in record time, to the astonishment of the crowd. Back then, the Air tandem was around $7800 if memory serves. Lots of folks interested in it.