Thanks for the input! I'm concerned/confused about leads who we remove from Marketo, but keep in Salesforce due to inactivity...if they take an action, how do we sync them back to Marketo?
If we remove these leads from Marketo, but they come back, have we lost all previous tracking for them?
Are there any other criteria that you've seen people use for purging their Marketo database, besides invalid entries, inactivity and unsubscribers? Also, what about people who have unsubscribed, but are still taking actions?
Thank you for any and all feedback!