You could roughly 10 years ago: https://news.ycombinator.com/item?id=34780696 https://news.ycombinator.com/item?id=34780696 And, it looks like that feature sti

You could roughly 10 years ago: https://news.ycombinator.com/item?id=34780696 https://news.ycombinator.com/item?id=34780696 And, it looks like that feature still exists: https://www.facebook.com/business/help/170456843145568 https://www.facebook.com/business/help/170456843145568 "Upload a list of emails to create a custom audience" Seems easy enough.