Can you elaborate more on your question, I assume you mean incremental load as what is newly created, what has changed since last data collection. ERPs/Source application has a creation_date, last_modified_date on the transaction tables. From the source, they can identify the incremental set of records and provide to us. On our side, if the record is new, it gets created, if it is existing, it gets updated with latest data. Anaplan's integration on complete collection (load) and incremental collection (load) is same as other applications.
It makes sense to collect only incremental data rather complete data everyday.