Why can’t brothers and sisters just get along? As I noted earlier this month, eBay’s free classifieds site Kijiji is coming on strong since its launch in the U.S. last summer. Of course, eBay owns 25 percent of Craigslist, but since the other 75 percent is not for sale, eBay is putting all of its eggs into Kijiji and taking Craigslist head on. In January, Kijiji had 2.3 million U.S. visitors, which made it the sixth largest classifieds site in the U.S., according to comScore. In six months, Kijiji has grown to be about ten percent the size of Craigslist (which had 26.7 million unique visitors in the U.S.). Worldwide, the numbers are much closer. Kijiji had 21.6 million visitors i ...