Here's my entry


This doesn't match the site and seems a bit too, um, cliche.
I can change the colors to match the site, no issue

I was trying to go for a more professional look (at the risk of looking cliche). I feel that a professional looking ad/banner sets a good impression before you even visit the site. Anyways, its upto Rollin.io to decide the final one, I can always make revisions if my design gets selected.
That's a good point, I can also make any required revisions, should my entries win. I also feel confident the other contest entrants could modify/adjust their entry designs in any way necessary too, should they win.