I think we need to redefine "scaling" for you. I was on a 2-hour podcast this morning (watch out for a link to that...coming soon!) And we talked about that. And I think the big problem is that we don't allow enough time to recognize how "scalable" a specific campaign really is.
Step 1: Test
Step 2: Mature
Step 3: Scale
This will prevent you from destroying the potential of campaigns that may have great potential if you're a bit more patient, and give more durability to the ones that you can scale.