It's simply annoying. I've been participating in contests for about 6 months now, and every friggin contest I see, someone always looks at the payment methods offers and asks for another one.
What the heck? The Contest Holder lists what he wants, he shouldn't have to add extra ones because 1 person would prefer Western Union then Paypal.
It's an outrage, don't you think? It really just annoys the hell outta me too.