The ArcGIS Map visual is free, and Power BI reports using the ArcGIS Map visual can be published for users to view in the Power BI service and on mobile devices at no extra cost. However, in many scenarios, the limit of 1,500 geocoding addresses may prove insufficient. Additionally, the four basemaps available (Light Gray Canvas, Dark Gray Canvas, Streets, and OpenStreetMap) may not provide the desired details, such as satellite imagery. 

With an ArcGIS Plus subscription, currently priced at $5 per user, per month, up to 5,000 addresses can be geocoded and plotted on a map. In the following image, the Plus icon appears above the zoom buttons of an ArcGIS Map visual: 

Plus subscriptions also enable eight additional basemaps, several of which including satellite imagery and access to many additional reference layers and infographics. The following site maintained by Esri provides further details on Plus subscriptions: http://arcg.is/2jG5DnG.