Deleting Marketo Persons that do not exist in SFDC
I have inherited a Marketo instance that has a large number of Marketo only persons - meaning they do not exist in Salesforce and SFDC type = is empty.
From my initial inspection, it appears most of these Persons were imported via list uploads for various programs so that we could use Marketo to send communication to customers who do not exist in SFDC and were being pulled from outside data sources.
My question is around deleting their person records from Marketo.
Is it best practice to remove these persons from Marketo as they do not exist in SFDC anyway? Would love to hear everyone's thoughts.