Why is this needed?

Most artist grab images from the internet and make that a cover not knowing they can get sued. You own full rights to the cover.

one cover per artist

Once you purchase a cover it is taken off the site. Nobody wants the same cover as another artist. Being a unique artist is key.

fast delivery

No need for long waiting. You will receive your cover art within 12-24 hours. (Can be within a few hours of purchase.)