Because they aren't stylish. If I wanted the most protective case out there, I'd spend less and get an Otterbox or something similar, but I don't like the bulk or how they look.I will never understand wrapping aluminum around the iPhone. If you drop it, it gets scratched and dinged, and looks like crap from that point forward. Plus I cannot see how aluminum is going to provide better shock absorption than plastic or rubber.
If you never drop your phone, then there is no need for a case. If you do, then why not get some thing that offers more protection at a fraction of the cost?
Eh. I don't like the look of the Draco at all, but it's better than the Arachnophobia, which is one of the strangest looking cases I've ever seen. I guess they were trying for a layered spiderweb look. They tried waaaay too hard - just like the designers who made the new Slingbox.Draco Design 5...looks cool!
Are you referring to the adhesive liner that you add to the phone or the ones pre-adhered to rails? If former some may choose not to use the liner in which case it may touch. For latter, I did not look at it that closely, but will next time I remove for cleaning. I know that the 'flex joints' which are non metal maintain constant contact. I can also say with confidence the side rails flex and do not touch unless forced or under impact. The top and bottom seem to be rigid.The inner liner prevents aluminum on aluminum.