I've been using Kagi for almost 18 months. In that time we've had a baby, and I have done many many searches about baby related things. It took months after he was born before I started getting any baby related targeted advertising (I'm pretty sure it was a result of a Facebook post). Whereas for the other parents, every advert they've seen has been baby stuff since well before the baby was born.

I like Kagi, I like the principle of aligned priorities over my privacy and I like the search quality. But that really cemented why it's worth it to me.