Well, that's more clever than a company I did due diligence for. Their strategy was to have a pool of API keys attached to new accounts that would take advantage of the Google Maps API free tier, and monitor its usage. As the free tier usage would run out, the system would roll over to a new API key automatically. Wrote that one up in big red marker in my report...
It didn't work out, and it still baffles me how anyone thought it could.