It seems like Krita uses that one: https://krita.org/en/donation-analytics/ https://krita.org/en/donation-analytics/ It's not mentioned on the Donate page itse

It seems like Krita uses that one: https://krita.org/en/donation-analytics/ https://krita.org/en/donation-analytics/ It's not mentioned on the Donate page itself though, so I'm not sure how they found that out in the first place.