Then I went to my Droidie site, and it has ads now. Oy.
But not on Unberkeley.
Thankfully not on the memorial site for my father.
No ads on Frontier News.
Update: There is a disclaimer on wordpress.com. "To support the service (and keep free features free), we also sometimes run advertisements."
Update #2: There's more. See item #2 on this page. If you're using Firefox (I am) you won't see the ads. So there's a bug. But actually I'd rather they not hide the ads from some users. That's probably why I wasn't aware they were showing ads to some of my readers, because I've been using Firefox for years.