Because none of the cases out there look good to me or add too much thickness?The bumpers are so strange looking. Is it mostly ATT users because they got the farked antenna? You can tell the ATT phones from the Verizon ones because all the ATT iPhones have the bumpers.... LOL.
Seriously, with all the great choices for cases and such, why on earth would anyone want to use one of those things on their iPhone?
They make perforated snap cases that have holes all over.That's not the Incase Snap, I saw... Strange, had more openings
Personally, I use a black rubber/white plastic knockoff bumper from sw-box. I also use a LuckyLabs spectra wrap in case it does scratch up the antenna band.