Idk why they don’t just slam them on lead paint and fake products. You could make a fucking Super Bowl level ad and do serious damage to amazon on real issues.
Because they would have to spend years in court litigating whether or not that was slander. Consumers have also been shown to respond better to positive causes than negative ones, and a non-profit funded by these guys is better equipped to spin it as a positive "working for a better future" type thing than them all running "Amazon bad" ads.
Just think of the press that an ad slamming amazon for that stuff would get. Plus you can avoid slander by either doing a real test or just by not naming amazon and implying it’s them.