Well I've SEEN JackSepticEye and a few other people have it in their dashboards. Quite a few popular YouTubers use it, but aren't always vocal about it, but sometimes you'll see them share their own analytics for news and you'll sometimes notice they have the TubeBuddy plugin icon as well. Phillip DeFranco even gave TubeBuddy a bit shoutout in one of his videos as well. Many, many channels that have millions of subscribers use it.