Yeah, I know - it uses ipify.org and my guess is some sites might use it for tracking, which is a shame. Note that no ads or tracking are used for the site, and I added a page showing uBlock users how to only allow calls to ipify from this domain.
While Google and https://api.ipify.org/ are cool and fast and memorable, this started as a side project to make it easy to copy and display in the tab title as well (plus I found a cheap domain). Thanks for clicking!
This is BS. :-(
Googling "what's my IP" is pretty memorable as well.