suspicious link about Valentine's day prizes from riot

someone just sent me a link i was suspicious replayed with "nope" ..then he said its an event from riot so i closed league copied the link and opened it in my browser and it from what what i saw it looks like a genuine league of legends site ( the was the game info ,boards, news and other things witch all are working ) with some sort of lottery ticket you get points for sharing and once you reached a certain amount of points you can participate with your desired prize ( riot points ) so am asking you guys if this is real or just a scam ( the reason am not so sure is because as i said the site looks genuine )
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