By choosing Kaepernick as their face, Nike is following Apple’s lead in standing up to something controversial despite potential adverse consequences – as if their ad’s text describes them. Not all will agree with the move, however, at least some will appreciate the fact that they do as they preach.
Now, while there is some (predicted) backlash, Nike is getting an outrageous amount of free media coverage. Those news stories are the classic case of “I don’t care what the newspapers say about me as long as they spell my name right.”