

This is a silly take. People are less likely to say no on the phone than they are to click no on a survey opt-in popup. And I am not even sure that Steam does a pop-up, users may have to go find the option to join the survey.
So there absolutely is a sampling bias. How significant it is and how/if Valve attempt to control for it doesn’t seem to be public information but it is definitely there.









Heh