The basic information (age, gender, location) are available for all users. However, we have other demographics that are mainly available for Australia, Brazil, Canada, France, Germany, Greece, India, Italy, Japan, Netherlands, Switzerland, Portugal, China, Denmark, Sweden, Bulgaria, Romania, Indonesia, Philippines, Czech, Finland, Mexico, Singapore, Argentina, United Arab Emirates, United Kingdom, United States, Spain and Russia. Now, the 'other' demographics we provide you by default with are education, marital status, number of children, career, employment status, race, income, plus more for each respondent.
We also gather demographics from Albania, Austria, Azerbaijan, Belgium, Bangladesh, Bahrain, Bolivia, Belarus, Ivory Coast, Chile, Colombia, Costa Rica, Algeria, Equador, Egypt, Ghana, Guatemala, Hong Kong, Israel, Jordan, South Korea, Kuwait, Kazakhstan, Lebanon, Sri Lanka, Lithuania, Morocco, Nepal, Oman, Peru, Quatar, Slovakia, Tunisia, Taiwan, Ukraine, Uzbekistan, Venezuela, Yemen. But note that we do not ask for the income level of the above countries (on this paragraph only).
Finally, all the demographic information we provide on our respondents is first-hand information, ie we have sent out demographic surveys to all users on the platform and we base the data we share on that.