The logic of the tiers are simple: if you are a cashback person, you’d obviously put all your spending on Tier 1 cards, followed by Tier 2 when your Tier 1 cards are fully maximised. A miles person would focus on the Miles column, and someone who is Team Value like me would see whether miles or cashback wins in the specific tier.
Cashback cards got a good boost over the past month or two and easily take the top couple of tiers.