All third party tags and libraries read into the HTML-banner, e.g. tracking pixels must be https in order not to get blocked. Regular landning pages or link url without tracking is not effected by this.
We can help with ad production of flash adverts. Contact your salesperson for prices. Ad material we receive for production can be sent in the following formats: EPS, TIFF, JPG. Photo material should be at least 72 dpi for best quality.