The bus boycott was very effective because the vast majority of riders were Black. When 75% of your customers hold the power, it's very powerful when they show solidarity and boycott. Though it should be remembered that this was a years long organizing strategy and was implemented at different times and different places with differences in outcome.

The grape boycott was implemented with a backdrop of 5 years of strikes.

National boycotts at this time in America are largely ineffective. The political atmosphere is extremely divided and reactionary, leading to situations where one side boycotting a product leads to the other side over purchasing that same product. There also is no labor movement, like the grape boycott, and thus no solidarity between industry. The point is to withhold profits, if you're not able to do that then a new strategy has to be considered.

Our generation is fixated on the politics of the 60s and incapable of ingenuity, forgetting that the political and economic backdrop of activism in 2020 doesnt in any way resemble our grandparents.