Please help! Questions about SG and cashonly agency

Hello bros, I have a question that confused me a lot. I checked and found the same set of girls in three website, for example: CBC Emily has profile on SG, cashonly, and escort168: http://en.scarboroughgarden.com/?page_id=1870 http://sex网站.com/bbs/forum.php?mod=viewthread&tid=10137 http://www.escort168.com/showprofile.php?username=EmilyNew They all showed the same picture and location is markham. and SG use a different phone number than cashonly and escort168. What is the relationship between them? Thanks a lot!!!