I'll have to see Google's stats as well. I went the other way leaving DDG for google AI mode. I use ddg still if I just want it to find a site. if I want answers, I use Google.
I would say it's more than visits that count, how many people are staying in the DDG or Google home page doing things? a lot more with Google I'd think. they've succeeded in trapping me in their product, instead of navigating away, and I'm happier for it. And... i still don't get what people's problem is (quality wise that is), you don't have to use AI results right, and it's pretty obvious what the AI interaction portion of the page is? I'm sure ad blocker extensions can remove it entirely as well. DDG's quality is not just lower, it requires me clicking around to get AI assisted summary.
I just don't get it, is people's time not valuable? even if half the time the AI results are wrong, it offsets (for me - and it's more like 5%) the time I waste clicking on random sites, some of them ad-trodden (where a blocker isn't available), outdated,etc.. and I usually don't even go to the second page of the result where as the AI reviews more than the first page or two to give me a summary. I'm saving lots and lots of time, getting more done with it.
This is tech, not religion, but it feels like people are conflating the two. it's just a tool that's used to search things.