There are about 75% as many deaths from prostate cancer as breast cancer. When's the last time someone told you to wear something to support prostate cancer sufferers? For that matter, colon & rectal cancer claims about 15% more lives. Ever see football players wearing any colors for that cause?
Cancer of all types sucks. I lost my father to lung cancer (which claims more lives than all three of the cancers above). There can be no doubt, however, that corporate America has latched onto breast cancer as a way to sell pink crap. Yes, they donate a portion - a SMALL one - of their profits, but rest assured they're laughing all the way to the bank.