The sample is selected from the sampling frame, which consists of a list of all members of the population of interest. The payments presented for completing an online survey vary according to who is conducting the survey, and how effortless it is to get the kind of participant they are looking for. The websites in this category do have some cool perks since you can do far more than just surveys. Only signed up to Survey Buddies a couple of months ago and currently won more than £20.
With bigger survey sites, you are paid every time they attain a …