Funny, was thinking that myself. But it really did work in the past for whatever reason. I believe I had it wrapped in a <div> tag, but still seems odd that it ever worked. Perhaps it was put in place with an older version of the ad snippet and/or a previous version of webtrees.
Anyway, I'm hoping that I can breakup the snippet and only insert the <ins> tag in the html module, and put the script in the top of the html via control panel. Hopefully, that will work.