Interesting Way to Promote a Website Launch

Handbagplanet.com is giving away 24 bags in 24 hours on their launch day of October 15th. Register for your free bag.

What's this have to do with the human condition? Well, I'm a brand strategist. Part of what I do is figure out how to motivate people to do things - I connect people with businesses. So, I'm fascinated by my own behavior. A potentially free bag has motivated me to write this blog post and send the link to three of my friends when I have plenty of other enjoyable or productive (or both) things to do.

Here's what I wonder: What is it about that slim chance of winning that motivates us to do things we likely wouldn't otherwise do? How many more times will I see this link in the next month? How many people will register for the very same bag I do? How many people will participate in this nearly free marketing tactic?