However, many times there isn’t. For example, if I like the username yitayningwut and I already use it on a few different sites, and I come here and see someone already has it (because it’s such a common and sought after user name, right?) then I’ll call myself yitayningwat or yitayningwut1 etc. The example you have given is a name which most probably lots of people think of, hence the various versions of it.
However both of theirs were older than mine, so if they weren’t capitalized that mine couldn’t be uncapitalized (even though I’m mbachur I can’t go around with someone elses screenname
hi real-brisker. It is a great screen name and maybe others want it too, so they make a variation of the spelling, just like in emails. As you know some may even take the same spelling and just add a number to the name.