Would like to get some Marketo best practices and insight. We get pre-show (event) attendee list that we pre-market to via marketo tools. I recently uploaded a list into a program list asset. I know for a fact that some of the names on this list are already customers, opportunities and/or leads in our sales force instance. We still want these people to stop by and visit our booth. I am worried about duplicates.
1.) Does marketo duplicate these records when I upload into my program list function?
2.) What are best practices for managing this list moving forward with regard to tracking my event ROI.