Nike's 30th anniversary campaign ad featuring Colin Kaepernick has sparked outrage all over social media — but free publicity is great for the sports giant. And sponsoring Kaepernick's cause ensures social justice will get more attention.

After taking the gold and bronze medals in the 200-meter dash at the 1968 Olympics, Tommie Smith and John Carlos shocked the world — the two Olympians held up black gloved fists for the entire anthem....