Here’s how we’re boosting online privacy together. Users that open a new private tab (also referred to as “incognito” by some users) in Brave will be presented with an option to select DuckDuckGo as their default search engine.
It's just giving the option for setting your default search as duckduckgo on Brave. Gotta dig deeper on this Anon. I know what you mean though, Brave search really sucks compared to Yandex
(2017) Brave and DuckDuckGo Partner to Improve Privacy on the Web
https://brave.com/brave-and-duckduckgo-partner-to-improve-privacy-on-the-web/
It's just giving the option for setting your default search as duckduckgo on Brave. Gotta dig deeper on this Anon. I know what you mean though, Brave search really sucks compared to Yandex