ZachXBT has downgraded Kraken from S-tier to B-tier in his centralized exchange ranking, citing concerns over token-listing due diligence, low-quality market listings and the exchange’s recent breach-response communication. The downgrade came after ZachXBT escalated criticism around exchange listings for tokens he described as low-quality or manipulated, naming M, RAIN, RIVER and RAVE among the examples. Kraken currently supports MemeCore M, Rain, RaveDAO and River across its platform, placing the exchange directly inside the broader debate over how centralized exchanges screen speculative assets before opening them to users.