Is altruism a good idea for an unprofitable capitalistic enterprise?Genetic database builder 23andMe (ME -11.45%) stock slid 10% through 12:05 p.m. ET Tuesday. Curiously, though, the news that 23andMe reported today seemed generally of the "good" variety. The company announced a collaboration with the nonprofit Colorectal Cancer Alliance "to help advance research on colorectal cancer in the Black/African American community." Now, why might investors consider this bad news for 23andMe stock?Non-profit plus a ...