Are you suggesting that there are no costs to pay when delivering software in normal retail channels? Of course there are. Apple's cut for distribution is probably in line with what other retailers charge.
Sure hackers may try harder. But they still won't get far, as the design of Mac OS X cannot be compared to that of Windows. The closet in my bedroom is a windowless room, like a bank vault. But me putting a lock on the door doesn't make it as secure as the vault, which is more secure by design.
The quality of a network is more than just signal strength in your home. Where do you live in Denver, exactly? I know a at least one weak area near Cherry Creek where nobody in the neighborhood will let AT&T build a tower. It's a full court NIMBY press. Have you reported the low signal to AT&T?