Vladimir Prelovac, on blog.kagi.com:
Today, the tides are changing. With new search sources proving more cost-efficient, the improved efficiency of our infrastructure, and the broader market embracing Kagi, we can again offer an unlimited experience to a broader group of users. We’re excited that this change will let many more people enjoy a fun, ad-free, and user-centric web search.
Been very impressed with Kagi. Not sure if $10 a month yet, but subscribed to the smaller $5 one for now.
Also see a future where the Kagi Kids search offering justifies the family plan.