As i have said before many moons ago, u can have many internet browsers installed in your computer as long your pc is high performance and doesn't lag when u launch multiple internet browsers all at once without the need to log in and out.
Assuming that u run windows os on your pc so your default internet browser is IE. You can then install other browsers like Firefox, Chrome, Safari, Opera etc.. in your machine.
So now u have 5 different internet browsers installed in your pc.
Internet Explorer
Firefox
Chrome
Safari
Opera
Next, sammyboy has two web addresses. sammyboy.com and singsupplies.com
Using 5 internet browsers at the same time with both sammyboy.com and singsupplies.com web addresses, u can have 10 different clones chatting simultaneously at the same time and this is what is happening in sammyboy. Of course there is also nick sharing which is fashionable.