One are outcomes dubiously tied to boycotts - did Sea World change their orca problem to protect revenues, or because they feared legal intervention?
The second is indirect outcomes, where the bad actor and the boycott-ee are different. If you threaten a purchaser over a supplier, or a supplier over a purchaser, they can hope to change behavior with no major loss of revenue. It's a very different situation than changing the actual bad behavior.
(And in many of these cases the bad behavior was unchanged, some external company just dissociated from it.)
There do seem to be some solid successes there, for instance with product safety, food source sustainability, or sweatshop labor. But even there, I'm curious whether the threat of boycott was a primary influence compared to the other activist campaigns around it.
> One are outcomes dubiously tied to boycotts - did Sea World change their orca problem to protect revenues, or because they feared legal intervention?
They feared legal intervention due to the public attention drawn by the boycott.
Affecting revenue of a targeted actor directly is not the only mechanism by which boycotts are intended to have an effect.
I agree that revenue hits are not the only (and usually not the primary) effect of boycotts.
But what I'm questioning is "due to the public attention drawn by the boycott." Was the consumer boycott actually a major reason SeaWorld feared legal action?
When Blackfish came out, a lot of musicians cancelled planned SeaWorld concerts, which had a visible and immediate revenue impact. Share prices dropped 33%, even though revenue only dropped ~1%; presumably shareholders feared the possibility of legal action. And a range of state and federal Congressmen introduced bills on regarding orca captivity, explicitly citing Blackfish as a motivator.
Boycotts are certainly correlated with major corporate and legal changes, but I'm skeptical that they're a significant cause. Examples like SeaWorld make me think that boycotts and policy changes have common causes (e.g. Blackfish), but the boycotts aren't themselves very impactful.
The Chicago Tribune had a clever bit about the gun-seller boycotts, arguing that boycotts only matter as a way to keep the topic in the news, and it basically doesn't matter whether people actually participate. That's basically my guess, also.