Couldn't that be modelled as 4 bandits: 1. Original colour/Original text 2. Original colour/"Buy Now" 3. Black colour/Original Text 4. Black colour/"Buy Now"

Couldn't that be modelled as 4 bandits: 1. Original colour/Original text 2. Original colour/"Buy Now" 3. Black colour/Original Text 4. Black colour/"Buy Now" A bit of a curse of dimensionality for anything except the simplest cases, but that is a different problem.