Anyone actually optimizing for ai search engines successfully?

Define successfully. We get cited in AI overviews and perplexity for some pages, and what those pages have in common is boring: a direct answer in the first paragraph under a heading that matches the question, an original number or a specific example, and an author with a real bio. Also check you aren't blocking the crawlers in robots.txt, a few sites block GPTBot and then wonder why ChatGPT never mentions them. Traffic from it is still small for us though, I wouldn't restructure a site around it yet.