Very strange to see this ad on DCUM. Its called
http://www.secondwife.com/ and it is basically a website for muslims to marry more than one wife. I do not want to start a debate on the pros and cons of this because it will turn into insulting Islam (sooner or later) - but this is objectionable to the sensibilities of many on this website, including Muslims.
If you think it needs to be there because of free speech etc., then it is your call.