Yup. The series of events was roughly this:

1. YouTubers made videos alleging charity fraud
2. Open hand made a donation (a week or so after)
3. YouTubers made follow up videos about golf events not showing up in income
4. The Completionist posted response video, which didn't mention the golf events (IIRC)
5. Follow up videos by YouTubers reacting to The Completionist's response