Good luck on another golfing site!
Market research companies are paid, by their clients, to provide specific demographic samples. I.E they may want only Latinos, and if you're not Latino, the don't want you in the survey - it is as simple as that.
If you fill out the "Peanut Labs" questionaire and allow them to put a cookie on your computer, they can be more productive in directing you to surveys that are seeking people like you.
It does get frustrating but, if you have the time, it is worth the efort.