Finally, to highten transparency we added escrow! So now you could take part in contest without any worries. You are welcome=)
I really wish you can find subscribers for your contest. As i described in my previous posts (see above comments) that it's not just a problem of transparency.
Suggestion : Why don't you change the payment currency (other than bitcoin, any alt) then publish this offer in the altcoin section? This should work for better visibility among bounty hunters and contest seekers.
BTC is the most convenient for conversion and well-spread cryptocurrency. Therefore, we decided to go for it for our participants ease of use and comfort.