Regarding the separate issue with referrals, anyone who shared their Arkham link may have inadvertently put their anonymity (or at least their email address) at risk. The pseudonymous m4gicpotato, a contributor to the privacy blockchain Beam, posted about the issue on Twitter on Monday, where it quickly went viral. M4gicpotato described themselves as a privacy advocate who has worked in crypto under various names since 2017.
Source: https://www.coindesk.com/business/2023/07/10/crypto-startup-arkham-has-apparently-been-doxxing-privacy-obsessed-users-for-months/?utm_medium=referral&utm_source=rss&utm_campaign=headlines