That one day cost corporations hundreds of millions of dollars. Numerous corporations, construction sites, factories, etc. were forced to shut down. (Tyson Foods, the world’s largest meat producer, for example, shut down most all of its plants).
Regardless of the boycott impact, their voices were heard and that was the entire point. Politicians have taken notice of the massive movement that has taken place in every major US city and it seems unlikely that the new legislation will be made law as a result of the mass demonstrations. But if it does, expect even larger protests.