In reply to your fonts question: I'm in the same situation and I haven't been able to find any kind of hard and fast solution for the use of fonts in banner ads. First time I ever hear it addressed! I have been using Flash CC and Animate Edge for the creation of the ads. What I have been doing to make sure WYSIWYG is guaranteed: I've simply been converting the entire text blocks to vector shapes. Usually there is not much text in banner ads, so the doubling up of characters is not adding much to the file size.