great for them as being static info there is NO NEED to get data back from the client while using the site and the data being displayed doesn't change that often. Sure there's more that can be done in html 5 than any earlier versions, but the basic html code still works in html 5 and modern browsers, so why not save all that bandwidth and use basic html?

I've seen pages displaying static info like FAQs that have scripts that calls scripts that call scripts that call scripts as every damn thing is a very little script and called by a higher level script so they go together like lego, but require a damn sight more download to be sent than just doing it all in basic html.

One of the easiest anti-ad defences is to restrict script activity, and the second is to deny third party scripts, and it's easy to get add-ons that do that for most browsers.