I had the exact same experience just this w/e. I think this site took advantage of people shopping around thanksgiving time. I signed up and without knowing it they had charged my acct. Didn't notice the $$ charged at first but received an email confirming a nbr of paid bids plus 50 free bids. I was also under the understanding that initial bids were free. They never responded to my email asking how the bidding worked, and this is before I c/o the $$ being "extracted"from my acct. I should have followed my first instinct to not complete signup once they asked for my credit card # right from the beginning, before any purchasing.
Stay away from them, I don't care how good a deal you could get,
Signed
Disappointed and broke!