Got this email from XXX Social
Dear Webmaster,
With regret we must inform you that our social bookmarking site
http://www.xxxsocial.com will be closed till the end of this month due to
abuse of several adult webmasters and also negative feedback from adult
webmasters community.
Thank you for understanding this situation and be sure to remove all your
links pointing to this domain.
Admin at XXXSocial.com