Some usernames have a skin attached to them because they purchased a private skin and supported chopcoin with it.
**Add your own skin to chopcoin.io for only 0.05 BTC, pay once and the skin will be in our library forever! **
Just send us an email to our support mail "firstname.lastname@example.org" with a 1000px X 1000px image.png that you own the right to.
As soon as we verify the image, we'll send you a bitcoin address.
Send the 0.05 BTC and we'll upload the image. It's as simple as that!