That's the issue. When we create a new field to designate a specific track, that would mean adding a filter to every single campaign in the original track to block them. That's just such a tedious process, I thought there'd be an easier way.
Say, for instance, you do a one-time offer of a longer trial. You create a new field to flag leads coming in from that offer. Do you really then have to go into every original campaign individually to add a filter that they're not an extended trial?