When it comes to how Ahrefs counts links, which of the following are true?

Ahrefs counts links with URL parameters because these are distinct URLs that can pass link equity and are treated as unique by search engines. For example, example.com?source=campaign is seen as different from example.com. Ahrefs does not count links within iframes because the content inside an iframe is treated as part of a separate page, not the embedding page. While Ahrefs crawls pages, it typically only counts the first instance of a link from a specific source page to a target page for ranking purposes, even if multiple links exist. Ahrefs generally does not count links directly embedded within PDFs as these are often not discoverable or crawlable in the same way as standard HTML links.