The placement of the Ads should be around (above, below, beside) the EntreCard widget or above the fold.
You can additionally promote the 1 Million EC - Free Traffic - Contest and write a review about the contest.
Already published reviews by Sponsors -thanks for this-:
Daily Blog Contest
Tinta at Papel
EzGreatLife - Family, Fitness and Finances
the fledgling blogger
Stunned by Stone with pic of sponsored ruby
My Frugal Ways
Kamila The Camel - A Camel in Bulgaria
My Online Contest
Use the article "Be part of the 1 Million EC - Free Traffic - Contest" as a little help or write it in your own words "Why you are a sponsor of the 1 Million EC - Free Traffic - Contest!"
On 31st August or 1st September you have to copy the Sponsorlist and post it as an article in your blog. This is the second promotional step for the visitors of your blog, to join our contest and win prizes!
Afterwards the participants have to blog the sponsorlist which gives throughout the four month period enough advertisement for our contest!
Here are the Ads with code: