Cloned objects are replicated physically rather than logically to secondary databases. That is, cloned tables in a standard database do not contribute to the overall data storage unless or until DML operations on the clone add to or modify existing data. However, when a cloned table is replicated to a secondary database, the physical data is also replicated, increasing the data storage usage for your account.
https://docs.snowflake.com/en/user-guide/database-replication-considerations.html#:~:text=Replication%20and%20Cloning,-Cloned%20objects%20are&text=However%2C%20when%20a%20cloned%20table,storage%20usage%20for%20your%20account.