A/B testing rarely has anything to do with matching the product to customer's stated preferences or looking out for their best interests.Bull, it's explicitly about figuring out what people want to do. You can argue all day long that this can be exploited, but in the end you aren't going to take an action you don't want to without coercion. If I show you a delivery donut ad a 1AM, because you've proven 90% more likely to impulse buy a donut at 1AM and then you do it, how is that not directly correlating to your interests? Conversely if I show you a gym ad at 8AM on Tuesday because I know that's when you get out of the meeting with the fit [insert gender] person at work you've always wanted to ask out on a date, how is that not directly in your interests?
businesses follow revealed preference
Yes exactly, stated preferences are worthless. Revealed preferences are priceless. The amount of people who say one thing and do another approaches 100%.
That's what I mean when I say there's no empirical footing for the claim that businesses can be trusted to look out for my interests.
You decide what your interests are by your actions. If I see your actions and then give you more of those, by definition I am looking out for your interests.
I think what you are trying to say is:
"People make terrible decisions and it's up to the government to prevent companies from letting you make those terrible decisions."
In which case, you're implicitly arguing that people make better voting decisions than purchasing decisions and that voting decisions better reflect their true preferences. A silly idea if there ever was one. I don't think this needs a reference in 2017.