Botched up launch, mediocre reviews, quite a few bundles, the US's interest in racing games has been getting smaller for years now, take your pick.
Driveclub will probably not make Sony any money, but if vgchartz sales (boosted by bundles) are somewhat correct and if the internet is to be believed then the game is at the very least building a fanbase and therefore a foundation for a sequel that Evolution will hopefully get to make and that they can then use to implement all they've learned from this first game to make a second game that's both critically acclaimed and financially successful.