Have any of you registered and downloaded the DNC database? Where did you store the database and scrub against it and how often?
We store the federal list in a constant database, which is the appropriate db type for this kind of data. (Note you ain't downloading it right now!)
Clients typically do a batch scrub at end of month, and also a trigger scrub as Phone fields are populated/changed.
The triggers run via webhook; batches can run via Marketo webhook but are much faster if done offline.
Do you do this in Marketo vs. SFDC?
Marketo, including direct webhook access and export/import.