Reduce the amount of leads/contacts synced from SFDC to Marketo
I inherited a Marketo instance and found out that they don't sync two thirds of our SFDC leads/contact to Marketo. Now, I'd love to sync all of it, but it will be too much of a cost.
Other than the usual exclusions (e.g. remove duplicates; don't sync if no email address; remove if hard bounced), has anyone got ideas on how we can restrict data flowing into Marketo sensibly? Maybe we can look at leads that got created before 2015 etc.
Would love to hear what others may have done.