The actor told senators that a producer tried to get him to drop a lawsuit against a Hollywood executive who Mr. Crews says sexually assaulted him at a party.
In the commercial, a bartender slides a light beer past three black people and into the hands of a fairer-skinned woman.
The website said that the bill, which removes protections from liability for facilitating trafficking, made it too risky to maintain its personal ads.
Researchers found an average of 2.3 more reported assaults on the day a rally came to town. The findings appear to confirm news reports about violence at the events.