I immediately checked how you do location lookups:
> IP lookup is powered by https://ipinfo.io. They provide a good service so please don't spam requests.
There was a thread about them recently — the scale of their operation was very surprising.
Internally, when it comes to API requests, we are doing our best to reach an "unlimited" level of API requests. On the operational side, we are just getting started. The distributed network of a thousand servers we operate only runs a handful of diagnostic tests (ping, traceroute, etc.).
We have a lot of plans, and I hope you will find us providing more fun stuff as we continue to grow!
(Probably not the nicest code and no doubt I've broken a lot of Go idioms, but it was a good learning exercise)
IPInfo is a good service and their developer relations were surprisingly relaxed about me (mis)using their API this way
https://ipinfo.io/blog/ipinfos-ip-hunt-2-2-million-ips-submi...
This is just our user base, to be honest and we like them for their mindset. We are happy to see users try our service in different ways and we learn a ton from them in that process. I certainly learned from you :)