On 22/07/2018
Following the launch of Google Maps Platform and changes to its products, Google has announced its developments for Maps service for professionals, as well as an application of pricing based on Javascript API "calls" effective since 16th of July 2018.
Since 11th June, Google has been implementing this plan by making Google Maps API only accessible to application developers and publishers that have activated credit card billing and have an API key.
If you use this service on your website, to display a map or a route, then you are affected by this change.