Why the survey?

So I spend most of my time online trying to avoid pop-ups and annoying malware, only to join this forum and... what is the first thing that happens? When I click on the link that says "create your own" discussion thread, it sends me to a survey with a competition that asks me for my mobile phone number!!!! Then when I get through the survey nothing happens. I close it and find an online casino pop-up in the background. What's the go with this Norton??? Not very professional in my opinion.