> we need to assume that the survey was done of reviews.org visitors.
That's pretty unlikely. Reviews.org likely engages one of many vendors (like Qualtrics[1]) that will solicit responses online for a survey you design and provide to them through their survey building tool.
That's pretty unlikely. Reviews.org likely engages one of many vendors (like Qualtrics[1]) that will solicit responses online for a survey you design and provide to them through their survey building tool.
[1] https://www.qualtrics.com/research-services/online-sample/