Earlier quoted context omitted.
It’s likely the payoff is also to prevent apple from building its own search engine to compete. As googles payoff is so lucrative
There have been reports and speculation that they’re doing just that. Of course it’s worth it for the negotiation threat alone, but Apple also really doesn’t seem to like depending on Google. I personally can’t see them switching any time soon, as DuckDuckGo’s search results are something between worse to terrible and I’m not sure they can do much better without collecting more data.
But the reverse is true too. DDG is now my default, but before, when Google didn't find something, I'd switch to DDG.
There is an implicit learning curve switching search engines. The way one crafts searches differs in subtle ways I don't understand on a conscious level.