That's a funny thing about statistics: obviously, you can't ever poll a group of people in its entirety BUT you don't need to. Even a seemingly small fraction of the whole can give you reasonably accurate insights, even when you're using random sampling (which is really the only option here since, well, we don't really have the information needed to do quoata sampling). In practice: the sample size in this survey would be good enough to produce data with a 99% confidence level (academics normally use 95%) with the margin of error being 3% for a group consisting of a MILLION people - and, while