You're welcome for the support. As far as i could see in the OCD curation circles that i participate in.... i haven't seen anything mentioned a bout that user. I am not familiar with ADM account and downvotes are always a possible automated response from people that oppose other accounts voting.
It's weird but for example, if OCD upvotes a post i nominate there are oftentimes a downvoting trail to autodownvote OCD and OCDBs account activity. Usually, those bot accounts don't have much stake so the downvotes don't really do any harm. But, in this case if significant rewards were removed only the ones associated with the downvotes would know why. Since rewards aren't the authors until payout, downvotes are controversially viewed across our spectrum of users. So, it's possible the downvotes had nothing to do with your friend's account or content but just the activity of the bigger accounts voting and downvoting each other. Just tell him to keep on keepin on and i will keep an eye out for his content and support accordingly.
@haibatlucky don't give up Haibat!
Thank you! I don't have understood every things you have written 😂 but I have understood that it is like a fight between whales (maybe) but now I'm very tired, I will read again your words 😊