I agree that it's not balanced by free time. I think all surveys will have this problem. All of the respondents need to have enough free time and be willing to

I agree that it's not balanced by free time. I think all surveys will have this problem. All of the respondents need to have enough free time and be willing to fill out the survey. I don't think that's a big problem with the methodology of trying to measure sentiment of a large population of people.