The bus boycotts in the US Civil Rights movement are a good example. "Hey bus company, we're going to stop riding your buses until you end your racist seating policies". It's clear what they wanted to happen, and it was in the power of the boycotted company to make that happen.
This new thing is something else. Just a general "don't buy from this company because ... uh ... vague noises about evil". Like, what is it exactly you want this company to do? How will you not buying from them force them to do that? Do they even know what you're asking for?
This is not about trying to effect any sort of change. It is just plain virtue signalling so you can appear righteous to others. There is zero chance of anything happening in the world because of this.