Repo maintainer here.

...can someone explain how the repo keeps resurfacing? I haven’t promoted it in a long time. (Looking at the repo traffic, it recently spiked on the 6th, but nothing since then.)

Tangentially related to the original project intent;

Is there a place where common things in the dev world like this are accumulated? For example, a list of all countries or list of the US states, for use with an HTML dropdown. I know there are various repos on Github that maintain these types of lists, such as English stop words, profanity word lists etc, but is there a service that accumulates these in a familiar, structured api?

SecLists (https://github.com/danielmiessler/SecLists) contains a wealth of security-related lists of this sort, including a useful section containing the most common passwords.