In a recent study, it was reported that mobile ads are six times more effective than the traditional banner, billboard, flyer, online banner, etc. Simply put, more people are spending time on the internet, and with the growth of e-commerce, more people are buying things off of the internet.
The following article offers helpful data on which industries get the highest dwell rate, that is impressions that are intentionally engaged with by touch, interaction or click. It offers other tips for mobile banners, such as in this case, 'bigger IS better'. If mobile advertising is a venue you haven't considered, you may want to look into this growing and more effective form of advertising.