Keeping unsubscribed leads?
Hello,
I'm going through a bit of a data cleanse exercise and was wondering what people's views on keeping or deleting unsubscribed leads from their instance? Or even those where they have soft-bounced from campaigns (company spam filters).
In particular, for leads who also exist in Salesforce...are some people keeping them in Marketo to maintain a view/history of the lead's behaviour and any form fills etc., to share intelligence with Sales? Would you still keep these in the system, or just keep the "active" ones?
Thanks!