I run https://onthegomap.com which uses Google Maps API. Last month it cost about $500 (for direction requests). Under the new pricing model it will cost $30,000 per month: $2,500 for page views, $27,000 for direction requests, and $1,000 for elevation request. It makes $300-500 per month in ad revenue. Time to shut down?
You can host your own OSM-based mapping for a fraction of your current cost, or move to Mapbox or similar. Drop in on https://help.osm.org/ or the #osm IRC channel on OFTC if you need any help.
Now I’d just need to find a suitable replacement for map tiles, place search, elevation api, and rewrite the app.