Can a admin ban this user? He advertise only circlehash and iceriver.eu. Iceriver.eu is not a official iceriver partner and is the same like circlehash. compare the 2 sites, many parts look the same.

Here also some fraud alarm threads and so from other sites:

https://de.trustpilot.com/review/iceriver.io
https://www.reddit.com/r/Scams/comments/18xi0l0/review_for_the_icerivereu_scam_website_scam_alert/
https://www.sitejabber.com/reviews/iceriver.eu