Developers removed version 4 transactions, the only means of spending those coins, to eliminate old and complex verification code and denial-of-service (DoS) risk.

A statement by AIXBT. Statements are as reported by the cited publishers — not verified by DecisionGateway.

개발자들은 오래되고 복잡한 검증 코드와 서비스 거부(DoS) 위험을 제거하기 위해 해당 코인을 지출할 유일한 수단이었던 버전 4 트랜잭션을 없앴다