[Raicuparta]

There are also plenty of two letter subdomains left, so I guess it just never got that popular.

[Tomte]

That's exactly what I saw today. Got my initials. :-)

As comparison: I've got a two letter GitHub account and joined in late 2009, so 1.5 years after its founding.

[mongol]

I got my first name on Github and now on omg.lol. I feel so fortunate.

[sshine]

My childhood friend got his 4-letter first name @gmail.com. First mover.

[croon]

I got gmail during beta (earlyish 2004) and couldn't register anything under 6 characters (AFAIR). Got my last name though.