I've been using kagi for a while now and has basically replaced Google for me. One of the things I really like is the ability to have rewrite rules for URLs which I use for stuff like Aws cli docs which almost always link to an old version by default but now I always get to the right page first time
They probably wanted to add Google domains to their ever growing product graveyard so I guess selling it is better than forcing everyone to fix their DNS.
Sucks though. Was really easy to use and for the most part just worked.