From an earlier post in this thread..
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The release notes are out now for the new 3.0.0739 version. But, this is the only new feature I saw listed:

Quote:

- Google ads are now shown inside some of the information balloons. These
are experimental and will only be shown some of the time.





Position a metropolitan area in your view, then search for hotels, etc. Click on the placemarks returned, eventually you'll come across one of the adverts. At least for now(?) they seem to appear at random- as noted in the Release Notes.