Okay, some content company or client from hell has rejected your submission. Don't delete it, re-tool it!
Whether you were at fault (mine tends to be grammar) or not, there is something called making your time count.
It doesn't matter whether you get upfront or residual payments, it does not make a difference.
This also comes in handy when dealing with shady clients. They reject and don't pay for your work but use it anyway.
Have you noticed how many anodynes there are laying around on the floor