I launched http://ipinfo.io back in 2013 and when it hit 50M API requests a day early this year I decided to launch the paid plans, and it's been profitable ever since. It's now hosted across 2 providers in 3 different cities, and handles almost 100M requests per day with a p99 of less than 1s and p50 of less than 100ms. Expect more services and features later this year!
Your product is impressive but I think you can do with this product much more valuable things.
For example, I want to specialize my landing page depends on visitors location. For example I want to change if user comes from US H1 and H2 message. Can you build something makes this possible?