i guess some people don't use same username as the way to prevent buyers comparing among the prices of different sites.
i choose a normal name, guess a name like xxxstudio sounds more professional but in the end what counts is still in your portfolio.
you can check out my website below for what website i think worth to join. thanks.
Thanks, Traveler, that helps me a lot. Although I haven't yet applied anywhere else, I did register as a user at a couple of places (not Shutterstock, though, so I'll use the referral link), and I'm trying to use an abbreviated form of my photo biz name where available. So I will hopefully be LFPhoto, as long as it isn't used!