because more money can be made that way as we as consumers like upgrades and we like to spend money on new devices in steps. WE do it, so they are happy to sell to us in that fashion.
i am a typical American consumer and work in the wireless world and a gadget fiend. I like the newest stuff as thats the coolest to me and millions of other tech junkies
you can always spot a non tech junkie as they are rocking the bb 7290
i have gone from bb 7290 to 7100 to smt 5600 to bb 8700 to treo 750 for a month to bb pearl all in just my last two years.
the market likes american consumers as they like to buy in upgrades and not in stages. weird wacky world we live in