Thanks for the entry. It's not bad. I like the "post it" idea, but it is hard to read the "Ad" given the red being drowned out by the black. We really want it to be more rounded and easily visible, so someone would notice it and remember it if they see it go by -- basically, if they saw it for 4 seconds, they would know what it is and who we are. Maybe something with a softer, more rounded font or wider print. I'm not sure that helps, but hope so.
In regards to Entry #18, nice job, it's very clean and I appreciate you working with the input I provided. I didn't realize we would have so many quality entries, so ranking these is tougher than expected. I think the difference between your design and the ones ranked higher is in the degree of what I will call quick glance eye-catching ability. Those are sort of different colors, very vibrant, that pop and make people wonder what the heck that thing is. Yours is also clear, but I don't think it has the same impact. I'm not sure that helps you, but not sure how else to explain it.
I think the other entries are have some coloring issues in that the red "Ad" portion gets drowned out on the black background.