Here is a list of a few that are worth a try. Most of them only accept US residents but I will update the list with companies that cater to people worldwide.
– Ipsos Survey Panel (US, UK, DE)
– Rewards Gateway (US)
– Survey4Profit (US, CA, UK, AUS)
– Survey Adventure (US)
– Survey Team (US)
– Panda Research (US)
If you have a bit of time on your hands why not complete a survey or two and see what you come out with.