Pay your bills on time - win Gold coins

Vodafone has this "brilliant" offer .
Pay your bills 10 days before the due date and you might stand a chance to win a gold coin .
2 representatives have already called me up today and asked me to pay . For someone like me - ( who never pays bill until the last day ) this is not a very lucritive offer. But then again .. to check the probability factor ... I talked to them a little more

Me : How many customers have won the gold coin so far ?
Rep : 15 sir.
Me : What are my odds in favour ? 1 in 100 , 1000 , 10,000 ?? How many customers am I competing against ? Any idea ?
Rep : Hmm sir .. 5000 .
Me : Are you sure about it . .. or are you just making up that number ?
Rep : No sir. You can check it up at the vodafone website sir .. [ And he goes on to 'recite' the URL to me ]

I check it up .. on their site . NOPE . Its not mentioned .. Nothing at all .
Anyways .. I will give it a shot .. Let me wait and see :)
There is always a first time for anything :)