So we transferred several hundred thousand leads to Marketo just over a year ago. The vast majority do not have an 'acquisition program'. We run contests -- ticket giveaways, exclusive experiences, etc. -- frequently. There's a healthy mix of existing subs and new folks entering. Many of the existing subs do not have an acquisition program/date. My question:
How should I be setting up a form completion flow that updates a lead's acquisition program and time only if they are new? Is it as simple as using 'if created at is blank, then make acquisition program X' (plus change data values unsub=false, various lists=true)?