I joined for the $20 Paypal credit, but was kinda skeptical to bid on anything if they would actually follow through. You can bid on items you are watching or bidding on ebay from your cell phone.
After reading a long thread on a savings forum, I tested it and bid on something I knew I would get outbid on, 2 minutes before the end of the auction, my cell phone rang and the automated system asked me if I wanted to raise my bid. I didn't win and 2 hours later I had a $20 credit in my PayPal acct! WooHoo! I used the $20 to pay for some SM pumps, after the discount I only paid $65!