IMVU's desperate corporate attempt to remain relevant and meta. It's a shame you can't really spend them on much, just so I could get some use out of the small handful of free coins I've attained. Can't trade them for credits as far as I know and don't think they're worth much real money. I always figured you'd be able to buy exclusive or premium stuff with them, but no. The 'services' on offer are practically a joke.