Earlier quoted context omitted.
Actually : it's a really nice move to keep this domain up and under control for one year! Moreover, I guess that people relying on this service will soon start to see the errors, go to the website, understand the situation and move on... so 1 year is quite enough I think. It's not like it was a service people use once a year...
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The creator started the project 5 years ago because people around him without technical ability wanted a DNS ad blocker, but didn't know how to setup pi-hole. His peak MRR through Patreon was 13$, and he received one or two separate donations of ~10$ every month as well. The servers alone cost him more money than he received.
Dutch source: https://tweakers.net/nieuws/191950/openbare-pi-hole-adhole-v...