All of the code to add Google ads to static .html pages is in
/tcl/ad-html.tcl.
Turning Ads off for one page
Insert <!--AD_NOADS-->
Turning Ads on for one page
Insert <!--AD_INSERTADS-->
Turning Ads on for one directory
Add a glob pattern to the procedure ad_google_ad_patterns.
Amazon Ads
A comment inside the .html file should expand into an Amazon ad or a
text link to amazon. The tags below need to be wrapped in !-- and --
(standard HTML comment syntax).
AMAZON_CANON_EOS_SYSTEM
expands into a big ad
wrapped in P and CENTER tags