Anthropic seems to have canceled many Claude Max subscription accounts again. Many of the accounts canceled this time are U cards. This has to make people wonder whether Anthropic directly performs the cancellation according to the U card number segment.

As a rule, Claude will refund the user after forcibly canceling the subscription and blocking the account. For the user, there is no loss in subscription fees, but it is very troublesome to reopen a new account.
U-card refers to a virtual prepaid card that supports the deposit and withdrawal of cryptocurrencies such as USDT. These cards are also provided by VISA or MASTERCARD. Under normal circumstances, they can be bound to various payment tools for online transactions.
However, such cards are also relatively easy to identify, because the issuing number range is basically fixed. Anthropic can identify these U-cards through a specific number range and cancel them in batches. This may have nothing to do with the IP address and purity used by the user.
Speaking of which, using U-cards or other cards that are easily banned to open Claude Max subscriptions is also a common method used by some API transfer stations, that is, opening multiple accounts and selling the credit to downstream users.
Because there are so many downstream users, the subscription quota of each Claude Max account can basically be consumed. When an account is closed and refunded, the API transfer station can get the opening fee, so the loss is very small. Of course, the cost of opening an account is still there, but the API transfer station can also make a lot of profits in this way.