MARKETWATCH - May 5 - Facebook is entering a crowded space: The dating industry is worth ~$3B. A Facebook spokeswoman said the new dating feature will allow users to set up a dating profile separate from their normal Facebook account, and activity on dating profiles won't be shared on the News Feed. Users will not be matched with friends, but rather others who have marked themselves as "single". Meredith Golden, a dating coach, said she believes the new feature will be used largely by divorcees and users over 40. It's not clear, however, whether Facebook will charge for the dating service and, if so, how much.