An Amazon spokesperson said previously, "We support every employee's right to criticize their employer's working conditions, but that does not come with blanket immunity against our internal policies, all of which are lawful." In their NLRB complaint, Costa and Cunningham alleged that Amazon fired them "based on discriminatory enforcement of policies or work rules," as CNBC reported. The case brought new scrutiny to Amazon's treatment of activists in its workforce, including a May 2020 letter to then-Amazon CEO Jeff Bezos from Sens. Elizabeth Warren and Bernie Sanders.