Spider Metrix panel members are called “spiders” of course :). Spiders earn points by completing surveys, profiles. They also have weekly polls where spiders get 1 point for answering the poll, as well as highly interesting “spider voice” forum where you can submit entries and also earn points.
I have been a “spider” for over 2 years, and I only received ONE survey from them, and I didn’t qualify. Of course I have spider points but it’s far from enough to cash out. I think it will take another several years for me to have enough points to get paid. They pay gift certificates or cash.
Spider Metrix seems have more surveys for spiders from countries other than US. I check their site from time to time, and notice that more surveys are available for spiders from Australia and Canada.
Spider Metrix is a special and interesting panel and it is worth joining just for fun.