Lets say we open up 3 placements for PH, YP and T8 in the US. Same landers, offers, ads. Now I know ads perform totally different depending on the placement, but what about landers/offers?
Do you treat each like a different campaign? Or can you share data between them?
I would probably treat them like diff. campaigns. Any change in the funnel, whether its placement, or site, or anything - could have an effect on conversion.. Obviously if there's a clear winner amongst all diff placements, I would consider it as the winner across the board.
Yep, different placements (unless they're very similar) should be in different campaigns. There's no penalty in having more campaigns, so why not do it as the data is more granular that way.