We use two different kinds of searches for the GeoGrid functionality.
SAB = Service Area Business
Google Places API
A Service Area Business will not have a physical address, for that you must use the SAB option, as well as include the map URL or place ID to run the search.
For Non Service Area searches, you are able to locate the physical address from the drop down, and run with either SAB mode or use your Google Places API.
Currently, we are running Non Service Area Business search free of charge with the SAB option. This gives you the ability to use our infrastructure to search for your business and not require your Google Places API Key.
The results will vary since places API doesn't return businesses that don't have their address shown. Some industries with more service based businesses can have a lot of variation between the places API and SAB, while other industries won't have as much variation.