Why is this site offline?

The website got online like 2 months ago. Why is it offline. But other sites like http://promo.na.leagueoflegends.com/en/yasuo/ http://promo.na.leagueoflegends.com/en/reborn/ (Sion) http://promo.na.leagueoflegends.com/en/harrowing/ Those start with Promo. We also have http://na.leagueoflegends.com/en/featured/skins/lunar-revel-2017#/gift this is the /featured/ Why does this site have a different host and why is it offline?
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