There are two types of pushdown in the cloud world. Standard PDO and Advance PDO.
Standard PDO is what PowerCenter had. It is ODBC based and you can do source,target or full. For Full the data had to be on the same database.
Advance PDO or ecosystem PDO is unique to IICS in that you can do a full PDO but the data resides on different storage structures. ADLS -> SYNAPSE, ADLS -> SNOWFLAKE. This is because we are tapping into the native connectors and not ODBC and since synapse/snowflake/redshift/bigquery have the ability to copy directly from the respective cloud storages.
Now you are absolutely correct you need to pay for PDO in older versions of the cloud license structure since the work was being do by the database and not the secure agent so we needed to meter the number of records you processed.
In the new IPU based model you dont license it directly since we charge based on the consumption rate you use.
A simple shipping request to GCS to request the feature will turn it on or they will tell you based on the existing license if you need to license it.