Searching the username dad wont work, Neither would PMing the username dad.

After so long, A name loses its dominance in gaia if it has a bunch of similar copies and has been inactive.

Username Dad > Inactive for 8 years > Other users hahve names very similar such as dad. or d.ad or other things. > Those users take dominance over the word "Dad"

Result : You can no longer log into, PM, Or view the profile of Dad. You have to go to gaiaonline.com/p/[USERID]