Google API Cost
While you're going to have to get a lot of clicks on your map(s) created using WP Nearby Places before you'll get charged, Google does now require a credit card in case you exceed their free limits, and they will charge you.
Learn more about the limits of the Google API we use for WP Nearby Places, and how much it will cost when the use exceeds their limits.
Click Here for Google maps' platform price sheet.
You can have the cost calculated, using Google's cost calculator, for MAPS, ROUTES, AND PLACES. WP Nearby Places uses "PLACES".
Click Here for Google's pricing calculator.
For more help for further questions, contact support.