It takes much practice on both sides, the issuing organization and the contest participants.
It will take many such contests to come to mature results. No master has fallen from the sky.
Good work thus far. A one page website is a fitting format for issuing contests.
Vodafone seeks sales and marketing ideas with a return on investment of a Euro 50,000 or less media budget. The deadline is November 30.
Markus Weber has more on the crowdsourcing contest for those in command of the German language here.