Similarly, Google claimed they would start penalizing websites that showed full-page ads for mobile apps instead of showing you the website. But every single time I try to get to Gmail, or Drive, or Calendar, or
any Google service on the web using a mobile device, I'm shown a full page ad for a mobile app. Google has been doing this for years, and it seems like it's also been a year since they said they'd punish all sites that do that. But Gmail still turns up as #1 in search results for email, so does calendar, etc. It seems to me that they have whitelisted themselves and choose not to punish any Google property that breaks the Google rules, despite claiming to do so.
Edit: Typically, when a service tells me "no you can't use this service until you view a full page ad" I just give up and not bother continuing to the service. But the same is not true for Google. I reluctantly click through the full page ad every single time. It's incredibly annoying that I let them get away with this and still use the services. They are so outrageously arrogant about it and it bothers me greatly, but still, I don't change.
Edit 2:
Going to calendar.google.com: http://i.imgur.com/fNRhhYx.png
First results for searching 'calendar': http://i.imgur.com/l3A5Wlh.png