&gt; I disagree - most publishers I&#x27;ve seen (including large and mid-level) have some of the most bloated HTML with megabytes(!) of javascript and CSS just for rendering + all the other stuff you mentioned. They are definitely not optimized.<p><a href="http:&#x2F;&#x2F;www.nytimes.com&#x2F;interactive&#x2F;2015&#x2F;10&#x2F;01&#x2F;business&#x2F;cost-of-mobile-ads.html" rel="nofollow">http:&#x2F;&#x2F;www.nytimes.com&#x2F;interactive&#x2F;2015&#x2F;10&#x2F;01&#x2F;business&#x2F;cost-...</a>