They’re not going to do that though. Getting demographic data is super important for them in establishing both a representative sample and interpreting that sample.
Imagine they get their results and the vast majority of respondents say they own no pinball machines and have no interest in owning one. “That’s interesting! Better let Stern know that no one wants to buy new pinball machines.” But then it turns out that everyone who took the survey is a college student without a job yet and they actually would be interested once they have some disposable income. Huge difference in the results all because demographic data is important.