Surveys all depend on how much demand there is from advertisers. Generally speaking, the bigger the market is, and stronger the economy, there is more demand for market research in that country. Surveys are not distributed evenly to each country, rather if people in that country spend a lot of money for example at McDonalds, then McDonalds will spend a lot of money to conduct surveys to those people to find out which products they like best, so that they know what to add to their menu next. Not only that, each person's profile is different. A survey advertiser might be looking for answers from a female, 43 years old, with 2 children, a dog, who is self employed, that has an iPhone (for example). So this is why some people get a lot of surveys and some don't.

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