The "Facebook" element is a relic from our previous product, which never took off, but we did become familiar with the Facebook API. Zuupy was a spare domain name that my co-founder had, which also happened to be unique and a 5-character .com.

We have considered letting non-Facebook users participate, but the core benefit to the retailer is traffic from and visibility within Facebook. Perhaps we will add another for Twitter, based on number of Tweets. But between Facebook and Twitter, we had to go with Facebook.

Thank you for your feedback!