What are the benefits of twilight photos?

They look cool. They just do. (Although they have to be done correctly!)
They showcase property lighting that a buyer generally doesn’t see because they most likely are viewing the home in daylight.
They allow you to stick out from your competition by offering a service they don’t offer.
They allow you to add a high-value (aka $$$) service to your product list.
They bring clients to you who normally list higher end properties and are more likely to use twilight photography services.