I belong to almost all of the sites you listed and out of all the surveys I take I don’t qualify for 95% of them. I will spend 15 minutes with generic questions with them collecting information about me then when done they say I’m not eligible for the survey or they have reached the required amount of people for that research. I can understand the reaching the required amount of people but I would think I would qualify for at least 1 or 2. It’s really discouraging when you take all that time to do the survey and not even get any points for doing so!
How it works: Opinion Outpost sends survey opportunities to your email address at a fairly significant pace, but you won’t qualify for all of them — as with most other survey sites, you’ll have to answer a few pre-screening questions to make sure you fit the demographic profile the company is interested in learning about. You can also log on to the website and view available surveys without having to sift through emails.