> They have no realistic option than use the social media sites in the link I included?
Perhaps. What options do you see, and how do those options meet their requirements? How well do you understand their requirements?
IMHO "revealed preference" has to be interpreted very carefully, in the light of the fact the market actually rarely fully satisfies people's preferences, and nearly everything is a compromise, sometimes a large compromise. I very rarely see that done when "revealed preference" is brought up. In nearly all cases, it's not a gotcha to undermine what people say about their preferences, but that's how a lot of people try to use it.
Perhaps. What options do you see, and how do those options meet their requirements? How well do you understand their requirements?
IMHO "revealed preference" has to be interpreted very carefully, in the light of the fact the market actually rarely fully satisfies people's preferences, and nearly everything is a compromise, sometimes a large compromise. I very rarely see that done when "revealed preference" is brought up. In nearly all cases, it's not a gotcha to undermine what people say about their preferences, but that's how a lot of people try to use it.