As is often the case, many supporters of the ad spoke out on social media to say the controversy only made them more likely to buy more Nike products. "Even if it means sacrificing everything." - with some even burning their Nike shoes and cutting the swoosh logo off their socks and shorts.
Kaepernick, who filed a grievance in October 2017 against the NFL, last played in the league during the 2016 season for the San Francisco 49ers. "Colin Kaepernick has done that and I think that we need to follow his example and really go where the heart leads, instead of where everybody expects you to go".
By Tuesday, we finally got a quote from Donald Trump on the matter.
Pentagon cancels $300m aid to Pakistan over terror record
Trump in August past year unveiled his new South Asia policy and asked Pakistan to do more against such groups. The deal was done even before the Pakistan Tehreek-e-Insaf (PTI) government assumed power, he added.
Conservative were quick to attack Nike for the advertisement push - which shows Kaepernick alongside the quote, "Believe in something. So whether or not I agree with what they're doing, I support it".
The campaign, which also includes LeBron James, Serena Williams, Shaquem Griffin and Odell Beckham Jr., received widespread backlash, with several people setting their Nike-wear on fire.
The rule also dictates that players who choose to be on the field for the anthem must stand. Teams with players who do not stand will be subject to fines and teams could also discipline the offenders.
The NFL responded to the ad in a statement on Twitter, saying, "the social justice issues that Colin and other professional athletes have raised deserve our attention and action".