the "problem" is that now when traders see the four letters D-G-I-N in that sequence they run for the door. Adding a fifth character doesn't change that.
But seriously, this fifth character "D" is just because of a newly listed share structure.
After 30 days it drops off and will be replaced by the fifth character "Q" which is a sort of code for savvy investors that this stock is just ready to EXPLODE!