Hi @ABeney
We also had this problem of not being able to utilize contacts with mulitlpe engagements from a marketing email. I wanted to introduce you to Segment Builder, a HubSpot Marketplace App that solves for this.
Segment Builder allows you to create “Segments” of engaged contacts from individual marketing emails, Campaigns, Subscription Type, or a combination. You can specify a percentage (top 10% of openers) or a threshold (at least 3 clicks) , and the segment will sync to HubSpot as a List, making it workable with all other parts of HubSpot.
Please do try it out for free, and I would love to hear your feedback if you have any.
Happy segmenting
Tom from Segment Builder