“Note: to improve results relevance, we keep track of data such as your referrer, location, device, browser, and OS.”
Give me a break. Obviously not relevant for a survey. Only relevant for whatever bullshit they’ll do with this data later on, unrelated to the survey.
“To improve results relevance...” this is just pure contempt for site visitors.
https://2017.stateofjs.com/2017/front-end/worldwide/
Also I'm curious what kind of nefarious "bullshit" you think one can do with browser statistics. Market special weight loss pills uniquely targeted to Safari users?
There are whole companies that exist just to collect and aggregate disparate data sets like this to make cross-device advertising measurement more possible. If you can only match 0.01% of the users in some ad campaign, then being able to even just double that fraction by also finding the same users on other devices is hugely valuable. The signature of your browser stats, location, and choice of what to browse absolutely can enable this matching, and a host of other techniques (like matching to similar users if no exact match is found, and using machine learning on huge sets of traffic data to learn how to perform the matching).
It sounds like your lack of imagination is putting people at risk in a disturbing way to me.