My original intent was just to use the scan to examine my negatives, as I don't yet have a light box. But when I saw that others here were posting what appeared to be positive images from negative scans, I became curious.
From a practical sense, it affords you the opportunity to post up an image and have it critiqued before you have the image printed; thus saving money.
This would really be beneficial, if it can be done with color negatives, as prints from medium format negatives are running me $2.00 each...ouch!
It remains a matter of personal integrity to maintain only analog images posted on this site. I think the membership here are pretty much committed to this.