I'd just like to share about a promotional program that I've had very good luck with. It's called Swagbucks.
You win swagbucks by searching the web, participating in polls and surveys, playing games and completing offers. Every day I earn at least 2 swagbucks by just using the toolbar add-on and participating in the daily poll. They also frequently post Swag Codes which provide bonus swag bucks. I am a pretty passive swagbucks user but I have gotten $10 in Amazon credit since I signed up in July!!
