Google has been expanding where and when they show ads in general and in Maps in particular. I am not sure when this started showing but Google Maps is now also showing ads deep within the tabs of business listings in Text View:
Showing ads inside Maps in general increases relevancy. Displaying subtle ads at the bottom of Maps adds context.
However showing them in this new context seems intrusive to me. There is something very disconcerting about reading the intimate details of a business listing and being confronted with the ad of a competitor.
It is possible that not too many business owners will notice as I am not sure that they or many Maps users go this deep into Text View in Maps. However, this is one case where I do not think that the benefit to Google will outweigh the negative feelings of business owners… It smacks of a certain blatant exploitation of the businesses’ good will equity.