I was kind of joking. I'm not sure if running a promotion based on losing is the best advertising strategy for a gambling business.
I'm pleased to be able to say that the wagering contest has been a successful promotion and we've now decided we will run it again next month.
So make use of these special banners and advertise your referral link where gamblers can be found.

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Nah a biggest loser thing is what they have in casinos when you gamble large amounts and lose.
The food vouchers and such that you get for a buffet when you lose $1000000+ in a night there.
If this is going to become a more permenant thing, I'd suggest having a BBCode/html version of the adverts also for anyone who wants to use them in their signature.