or what they could've done instead of selling the SAME EXACT CAR with different brands on them, would've been to create some variety within the brands instead of sharing every single part among every car. Ford has done an excellent job separating Lincoln from Ford, for instance, by making sure that even though they are very similar, their image is completely different.
When people look at an Escalade, a Yukon, and a Tahoe, they see the same car. When people look at a Navigator and an Expedition, they see 2 different things.